Differentiating Polymyalgia rheumatica from other diseases: Difference between revisions

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=== Differentiating polymyalgia rheumatica from other causes of myopathy ===
=== Differentiating polymyalgia rheumatica from other causes of inflammatory myopathy ===


[[Dexamethasone suppression test|<nowiki/>]]
{|
{|
! rowspan="2" style="background:#4479BA; color: #FFFFFF;" align="center" + |Organ system
! rowspan="2" style="background:#4479BA; color: #FFFFFF;" align="center" + |Organ system
Line 148: Line 149:
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Electromyogram
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Electromyogram
|-
|-
! rowspan="3" style="background:#DCDCDC;" align="center" + |Medication−induced
| rowspan="5" |Inflammatory/ Rheumatologic
! style="background:#DCDCDC;" align="center" + |[[Corticosteroids]]<ref name="pmid24083177">{{cite journal |vauthors=Gupta A, Gupta Y |title=Glucocorticoid-induced myopathy: Pathophysiology, diagnosis, and treatment |journal=Indian J Endocrinol Metab |volume=17 |issue=5 |pages=913–6 |date=September 2013 |pmid=24083177 |pmc=3784879 |doi=10.4103/2230-8210.117215 |url=}}</ref>
! style="background:#DCDCDC;" align="center" + |[[Polymyalgia rheumatica|Polymyalgia Rheumatica]]<ref name="pmid8948307">{{cite journal| author=Myklebust G, Gran JT| title=A prospective study of 287 patients with polymyalgia rheumatica and temporal arteritis: clinical and laboratory manifestations at onset of disease and at the time of diagnosis. | journal=Br J Rheumatol | year= 1996 | volume= 35 | issue= 11 | pages= 1161-8 | pmid=8948307 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=8948307  }}</ref>
| style="background:#F5F5F5;" align="center" + |Variable
| style="background:#F5F5F5;" align="center" + |50s
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + |Diffuse
| style="background:#F5F5F5;" align="center" + |
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* [[Central obesity]]
* Excessive [[sweating]]
* [[Insomnia]]
* Reduced [[libido]] 
* [[Amenorrhoea|Amenorrhea]]
* [[Infertility]] 
* Psychological disturbances
| style="background:#F5F5F5;" align="left" + |
*Positive h/o medications
| style="background:#F5F5F5;" align="left" + |
* Facial and sphincter [[Muscle|muscles]] are usually spared
| style="background:#F5F5F5;" align="left" + |
* Positive [[ACTH stimulation test]]
* 24-hour urine [[cortisol]]
* Low dose [[dexamethasone suppression test]]
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Normal
|-
! style="background:#DCDCDC;" align="center" + |[[Statins]]<ref name="pmid22001973">{{cite journal |vauthors=Tomaszewski M, Stępień KM, Tomaszewska J, Czuczwar SJ |title=Statin-induced myopathies |journal=Pharmacol Rep |volume=63 |issue=4 |pages=859–66 |date=2011 |pmid=22001973 |doi= |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |60+
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−/+([[Rhabdomyolysis]])
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
*Positive h/o medications
*H/o other medication use
| style="background:#F5F5F5;" align="left" + |
* [[Tenderness]]
* Muscle aches
| style="background:#F5F5F5;" align="left" + |
* '''↑↑''' Liver enzymes
| style="background:#F5F5F5;" align="left" + |
* '''↑↑'''
| style="background:#F5F5F5;" align="left" + |
* [[Necrosis]]
* Degeneration, and regeneration of fibers
* Phagocytic infiltration
| style="background:#F5F5F5;" align="left" + |
* Normal
|-
! style="background:#DCDCDC;" align="center" + |[[Alcohol]]<ref name="pmid11784353">{{cite journal |vauthors=Preedy VR, Adachi J, Ueno Y, Ahmed S, Mantle D, Mullatti N, Rajendram R, Peters TJ |title=Alcoholic skeletal muscle myopathy: definitions, features, contribution of neuropathy, impact and diagnosis |journal=Eur. J. Neurol. |volume=8 |issue=6 |pages=677–87 |date=November 2001 |pmid=11784353 |doi= |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |Variable
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + | +/−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* [[Swelling]]
* Tender
* [[Erythema]] and induration
| style="background:#F5F5F5;" align="left" + |
* [[Alcohol]] intoxication
| style="background:#F5F5F5;" align="left" + |
* Change in [[mental status]]
* [[Telangiectasias|Telangiectasia]]
* [[Peripheral neuropathy]]
| style="background:#F5F5F5;" align="left" + |
* Monspecific and are normal in many patients
| style="background:#F5F5F5;" align="left" + |
* Normal or '''↑↑'''
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Normal
|-
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Organ system
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Disease
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Age of onset
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Muscle weakness
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Fever
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Myalgia
! style="background:#4479BA; color: #FFFFFF;" align="center" + |'''Contractures'''
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Gait abnormality
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Neuropathy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Atrophy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Stiffness
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Myoglobinuria
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Other features
! style="background:#4479BA; color: #FFFFFF;" align="center" + |History
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Physical
Examination
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Laboratory Findings
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Creatine Kinase
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Muscle Biopsy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Electromyogram
|-
! rowspan="6" style="background:#DCDCDC;" align="center" + |Endocrine
! style="background:#DCDCDC;" align="center" + |[[Cushing's disease]]<ref name="pmid25221399">{{cite journal |vauthors=Sharma V, Borah P, Basumatary LJ, Das M, Goswami M, Kayal AK |title=Myopathies of endocrine disorders: A prospective clinical and biochemical study |journal=Ann Indian Acad Neurol |volume=17 |issue=3 |pages=298–302 |date=July 2014 |pmid=25221399 |pmc=4162016 |doi=10.4103/0972-2327.138505 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |25 −45
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* [[Decreased libido]]
* [[Obesity]]/[[weight gain]]
* [[Plethora]]
* Round face
* Menstrual changes
* [[Hirsutism]]
* [[Hypertension]]
* [[Ecchymoses]]
* [[Lethargy]]
* [[Depression]]
* Dorsal fat pad
* Abnormal glucose tolerance
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* Facial and sphincter [[muscles]] are usually spared
* [[Overweight]]
* Straie
* [[Moon face]]
* [[Hypertension|HTN]]
* [[Hyperpigmentation]]
| style="background:#F5F5F5;" align="left" + |
* Positive [[ACTH stimulation test]]
* 24-hour urine [[cortisol]]
* Low dose [[Dexamethasone suppression test|dexamethasone <nowiki/>suppression test]]
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Atrophy of type 2 muscle fibers, especially type 2B
| style="background:#F5F5F5;" align="left" + |Normal
|-
! style="background:#DCDCDC;" align="center" + |[[Adrenal insufficiency]]<ref name="pmid30656022">{{cite journal |vauthors=Ruff RL, Weissmann J |title=Endocrine myopathies |journal=Neurol Clin |volume=6 |issue=3 |pages=575–92 |date=August 1988 |pmid=3065602 |doi= |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |30−50 years
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
| style="background:#F5F5F5;" align="left" + |
* Signs of [[glucocorticoid]], [[mineralocorticoid]], and, [[androgen]] deficiency
* [[Weight loss]]  
| style="background:#F5F5F5;" align="left" + |
| style="background:#F5F5F5;" align="left" + |
* Signs of [[postural hypotension]]
* History of joints stiffness, worse in the morning
* History of [[tuberculosis]]
* History of [[malignancy]]
* History of other [[autoimmune disease]]
| style="background:#F5F5F5;" align="left" + |
| style="background:#F5F5F5;" align="left" + |
* [[Hypotension]] 
* Restricted shoulder motion
* [[Hyperpigmentation]] 
* Auricular−cartilage calcification 
* [[Vitiligo]]
| style="background:#F5F5F5;" align="left" + |
| style="background:#F5F5F5;" align="left" + |
* [[Electrolyte abnormalities]]
* '''↑↑''' [[Erythrocyte sedimentation rate|ESR]]
* [[Hypoglycemia]] 
* '''↑↑''' [[C-reactive protein|CRP]]
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Normal
|-
! style="background:#DCDCDC;" align="center" + |[[Hyperaldosteronism]] with myopathy<ref name="pmid5037033">{{cite journal |vauthors=Sambrook MA, Heron JR, Aber GM |title=Myopathy in association with primary hyperaldosteronism |journal=J. Neurol. Neurosurg. Psychiatry |volume=35 |issue=2 |pages=202–7 |date=April 1972 |pmid=5037033 |pmc=494037 |doi= |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |50
| style="background:#F5F5F5;" align="center" + |Proximal<br>&<br>distal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
 
[[Rhabdomyolysis]]
| style="background:#F5F5F5;" align="left" + |
* [[Palpitations]]
* [[Hypertension]]
| style="background:#F5F5F5;" align="left" + |
* Episodes of [[Palpation|increased heart beats]]
| style="background:#F5F5F5;" align="left" + |
* [[Hyperpigmentation]]
| style="background:#F5F5F5;" align="left" + |
* [[Hypokalemia]]
| style="background:#F5F5F5;" align="left" + |
| style="background:#F5F5F5;" align="left" + |
* Normal  
* Normal  
| style="background:#F5F5F5;" align="left" + |
| style="background:#F5F5F5;" align="left" + |
* Normal  
* Normal  
| style="background:#F5F5F5;" align="left" + |
|
* Normal
|-
! style="background:#DCDCDC;" align="center" + |[[Hyperthyroidism]]<ref name="pmid28746208">{{cite journal |vauthors=Li Q, Liu Y, Zhang Q, Tian H, Li J, Li S |title=Myopathy in hyperthyroidism as a consequence of rapid reduction of thyroid hormone: A case report |journal=Medicine (Baltimore) |volume=96 |issue=30 |pages=e7591 |date=July 2017 |pmid=28746208 |pmc=5627834 |doi=10.1097/MD.0000000000007591 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |40
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="left" + |
* Signs of [[hyperthyroidism]]
| style="background:#F5F5F5;" align="left" + |
* H/o of [[weight loss]]
| style="background:#F5F5F5;" align="left" + |
* [[Sweating]]
* [[Tremor]]
* Neck swelling
| style="background:#F5F5F5;" align="left" + |
* Decreased [[TSH]]
| style="background:#F5F5F5;" align="left" + |
* '''↑↑'''
| style="background:#F5F5F5;" align="left" + |
* Non specific
| style="background:#F5F5F5;" align="left" + |
* [[Myotonic]]
|-
! style="background:#DCDCDC;" align="center" + |[[Hypothyroidism]]<ref name="pmid6627693">{{cite journal |vauthors=Khaleeli AA, Griffith DG, Edwards RH |title=The clinical presentation of hypothyroid myopathy and its relationship to abnormalities in structure and function of skeletal muscle |journal=Clin. Endocrinol. (Oxf) |volume=19 |issue=3 |pages=365–76 |date=September 1983 |pmid=6627693 |doi= |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |55
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + | + [[Rhabdomyolysis MRI|Rhabdomyolysis]]
| style="background:#F5F5F5;" align="left" + |
*  Signs of [[hypothyroidism]]
| style="background:#F5F5F5;" align="left" + |
* H/o [[weight gain]]
| style="background:#F5F5F5;" align="left" + |
* [[Myxedema|Myxoedema]] 
* Muscle pseudohypertrophy
| style="background:#F5F5F5;" align="left" + |
* Increased [[TSH]]
| style="background:#F5F5F5;" align="left" + |
* '''↑↑'''
| style="background:#F5F5F5;" align="left" + |
* Nonspecific 
| style="background:#F5F5F5;" align="left" + |
* Normal
|-
! style="background:#DCDCDC;" align="center" + |Diabetic infraction<ref name="pmid25932331">{{cite journal |vauthors=Horton WB, Taylor JS, Ragland TJ, Subauste AR |title=Diabetic muscle infarction: a systematic review |journal=BMJ Open Diabetes Res Care |volume=3 |issue=1 |pages=e000082 |date=2015 |pmid=25932331 |pmc=4410119 |doi=10.1136/bmjdrc-2015-000082 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |45 
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="left" + |
* [[Cramps]]
* Sudden onset of [[pain]]
* Anterior thigh [[muscles]] are most commonly involved
| style="background:#F5F5F5;" align="left" + |
* H/O long standing [[diabetes]]
| style="background:#F5F5F5;" align="left" + |
* [[Swelling]]
* [[Tenderness]]
| style="background:#F5F5F5;" align="left" + |
* Elevated [[ESR]]
* [[Leukocytosis]]
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* [[Necrosis]]
* [[Edema]]
| style="background:#F5F5F5;" align="left" + |
* Normal
|-
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Organ system
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Disease
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Age of onset
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Muscle weakness
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Fever
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Myalgia
! style="background:#4479BA; color: #FFFFFF;" align="center" + |'''Contractures'''
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Gait abnormality
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Neuropathy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Atrophy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Stiffness
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Myoglobinuria
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Other features
! style="background:#4479BA; color: #FFFFFF;" align="center" + |History
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Physical
Examination
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Laboratory Findings
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Creatine Kinase
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Muscle Biopsy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Electromyogram
|-
|-
! rowspan="5" style="background:#DCDCDC;" align="center" + |Inflammatory/ Rheumatologic
! style="background:#DCDCDC;" align="center" + |[[Dermatomyositis]]<ref name="pmid1658649">{{cite journal| author=Dalakas MC| title=Polymyositis, dermatomyositis and inclusion-body myositis. | journal=N Engl J Med | year= 1991 | volume= 325 | issue= 21 | pages= 1487-98 | pmid=1658649 | doi=10.1056/NEJM199111213252107 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=1658649  }}</ref>
! style="background:#DCDCDC;" align="center" + |[[Dermatomyositis]]<ref name="pmid1658649">{{cite journal| author=Dalakas MC| title=Polymyositis, dermatomyositis and inclusion-body myositis. | journal=N Engl J Med | year= 1991 | volume= 325 | issue= 21 | pages= 1487-98 | pmid=1658649 | doi=10.1056/NEJM199111213252107 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=1658649  }}</ref>
| style="background:#F5F5F5;" align="center" + |40s−50s<br>Can affect children  
| style="background:#F5F5F5;" align="center" + |40s−50s<br>Can affect children  
Line 598: Line 296:
| style="background:#F5F5F5;" align="left" + |
| style="background:#F5F5F5;" align="left" + |
* Normal  
* Normal  
|-
! style="background:#DCDCDC;" align="center" + |[[Polymyalgia rheumatica|Polymyalgia Rheumatica]]<ref name="pmid8948307">{{cite journal| author=Myklebust G, Gran JT| title=A prospective study of 287 patients with polymyalgia rheumatica and temporal arteritis: clinical and laboratory manifestations at onset of disease and at the time of diagnosis. | journal=Br J Rheumatol | year= 1996 | volume= 35 | issue= 11 | pages= 1161-8 | pmid=8948307 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=8948307  }}</ref>
| style="background:#F5F5F5;" align="center" + |50s
| style="background:#F5F5F5;" align="center" + |Diffuse
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="left" + |
* [[Weight loss]]
| style="background:#F5F5F5;" align="left" + |
* History of joints stiffness, worse in the morning
| style="background:#F5F5F5;" align="left" + |
* Restricted shoulder motion
| style="background:#F5F5F5;" align="left" + |
* '''↑↑''' [[Erythrocyte sedimentation rate|ESR]]
* '''↑↑''' [[C-reactive protein|CRP]]
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Normal
|-
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Organ system
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Disease
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Age of onset
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Muscle weakness
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Fever
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Myalgia
! style="background:#4479BA; color: #FFFFFF;" align="center" + |'''Contractures'''
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Gait abnormality
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Neuropathy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Atrophy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Stiffness
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Myoglobinuria
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Other features
! style="background:#4479BA; color: #FFFFFF;" align="center" + |History
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Physical
Examination
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Laboratory Findings
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Creatine Kinase
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Muscle Biopsy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Electromyogram
|-
! rowspan="5" style="background:#DCDCDC;" align="center" + |Genetic
! style="background:#DCDCDC;" align="center" + |[[Becker's muscular dystrophy|Becker muscular dystrophy]]<ref name="pmid25037084">{{cite journal |vauthors=Flanigan KM |title=Duchenne and Becker muscular dystrophies |journal=Neurol Clin |volume=32 |issue=3 |pages=671–88, viii |date=August 2014 |pmid=25037084 |doi=10.1016/j.ncl.2014.05.002 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |<13yrs
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* Milder form of [[Duchenne muscular dystrophy|Duchenne]]
| style="background:#F5F5F5;" align="left" + |
* [[Growth delay]]
* Age of onset of symptoms is much delayed than [[Duchenne muscular dystrophy|duchenne]]
| style="background:#F5F5F5;" align="left" + |
* Positive Grower sign
| style="background:#F5F5F5;" align="left" + |
* Decreased amount of [[dystrophin]].
| style="background:#F5F5F5;" align="left" + |
* ↑↑
| rowspan="2" style="background:#F5F5F5;" align="left" + |
** Muscle fibril degeneration, regeneration
** Isolated fiber hypertrophy
** Muscle replacement with fat and connective tissue
| rowspan="2" style="background:#F5F5F5;" align="left" + |
* [[Myopathic]]
|-
! style="background:#DCDCDC;" align="center" + |[[Duchenne muscular dystrophy]]<ref name="pmid250370842">{{cite journal |vauthors=Flanigan KM |title=Duchenne and Becker muscular dystrophies |journal=Neurol Clin |volume=32 |issue=3 |pages=671–88, viii |date=August 2014 |pmid=25037084 |doi=10.1016/j.ncl.2014.05.002 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |<13 yrs
| style="background:#F5F5F5;" align="center" + | Proximal
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="left" + |
* Calf psedohypertrophy
* [[Cardiomyopathy]]
* [[Kyphoscoliosis]]
* [[Cognitive impairment]]
| style="background:#F5F5F5;" align="left" + |
* Early onset
| style="background:#F5F5F5;" align="left" + |
* Positive Grower sign
| style="background:#F5F5F5;" align="left" + |
* Errors in the Xp21 gene.
* Absence of [[dystrophin]].
| style="background:#F5F5F5;" align="left" + |
* '''↑↑'''
|-
! style="background:#DCDCDC;" align="center" + |[[Limb-girdle muscular dystrophy|Limb−girdle muscular]] dystrophies<ref name="pmid18769252">{{cite journal |vauthors=Guglieri M, Straub V, Bushby K, Lochmüller H |title=Limb-girdle muscular dystrophies |journal=Curr. Opin. Neurol. |volume=21 |issue=5 |pages=576–84 |date=October 2008 |pmid=18769252 |doi=10.1097/WCO.0b013e32830efdc2 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |<15 yrs
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* Calf hypertrophy
* Scapular winging
* [[Cardiomyopathy]]
* [[Cardiac arrhythmia|Cardiac arrhythmias]]
* Respiratory muscle weakness
| style="background:#F5F5F5;" align="left" + |
* [[Autosomal dominant]]
* Deterioration of ability to run/walk
| style="background:#F5F5F5;" align="left" + |
*[[Muscle weakness]] is generally symmetric 
| style="background:#F5F5F5;" align="left" + |
* [[LMNA]] gene
* CAV3 gene
| style="background:#F5F5F5;" align="left" + |
* '''↑↑'''
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* [[Myopathic]]
|-
| style="background:#DCDCDC;" align="center" + |[[Myotonic dystrophy]]<ref name="pmid22995693">{{cite journal |vauthors=Udd B, Krahe R |title=The myotonic dystrophies: molecular, clinical, and therapeutic challenges |journal=Lancet Neurol |volume=11 |issue=10 |pages=891–905 |date=October 2012 |pmid=22995693 |doi=10.1016/S1474-4422(12)70204-1 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |<18 years
| style="background:#F5F5F5;" align="center" + |Proximal<br>&<br>distal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* [[Myotonia]]
* [[Cataracts]]
* [[Diabetes mellitus]]
* Frontal balding
* Cardiac arrhythmias
* [[Cholecystitis]]
* [[Pregnancy]]
* Eyelid [[ptosis]]
| style="background:#F5F5F5;" align="left" + |
* Positive family history
| style="background:#F5F5F5;" align="left" + |
* Muscles often contract and are unable to relax
| style="background:#F5F5F5;" align="left" + |
* Mutations in the [[DMPK]] gene
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* [[Myopathic]]
|-
| style="background:#DCDCDC;" align="center" + |[[Glycogen storage disease]]<ref name="pmid11957192">{{cite journal |vauthors=Kannourakis G |title=Glycogen storage disease |journal=Semin. Hematol. |volume=39 |issue=2 |pages=103–6 |date=April 2002 |pmid=11957192 |doi= |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |Variable
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* [[Autosomal recessive|AR]]
* [[Fatigue|Faituge]]
* [[Hypoglycemia]]
| style="background:#F5F5F5;" align="left" + |
* [[Exercise intolerance]]
| style="background:#F5F5F5;" align="left" + |
* [[Hypotonia]]
* [[Hepatomegaly]]
| style="background:#F5F5F5;" align="left" + |
* [[Lactic acidosis]]
* Elevated liver enzymes
* [[Ketosis]]
| style="background:#F5F5F5;" align="left" + |
* '''↑↑'''
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Normal
|-
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Organ system
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Disease
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Age of onset
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Muscle weakness
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Fever
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Myalgia
! style="background:#4479BA; color: #FFFFFF;" align="center" + |'''Contractures'''
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Gait abnormality
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Neuropathy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Atrophy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Stiffness
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Myoglobinuria
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Other features
! style="background:#4479BA; color: #FFFFFF;" align="center" + |History
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Physical
Examination
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Laboratory Findings
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Creatine Kinase
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Muscle Biopsy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Electromyogram
|-
! rowspan="5" style="background:#DCDCDC;" align="center" + |Infectious
! style="background:#DCDCDC;" align="center" + |[[Lyme disease]]<ref name="pmid2795056">{{cite journal |vauthors=Schoenen J, Sianard-Gainko J, Carpentier M, Reznik M |title=Myositis during Borrelia burgdorferi infection (Lyme disease) |journal=J. Neurol. Neurosurg. Psychiatry |volume=52 |issue=8 |pages=1002–5 |date=August 1989 |pmid=2795056 |pmc=1031843 |doi= |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |Variable
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + | +/−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* Erythema Migrans
* Flu−like symptoms
* [[Lyme arthritis]]
* [[Neurological]] manifestations
| style="background:#F5F5F5;" align="left" + |
* H/o tick bite
* Hiking trip
| style="background:#F5F5F5;" align="left" + |
* Target−like [[lesions]]
* HSM
| style="background:#F5F5F5;" align="left" + |
* Clinical diagnosis
* +Serology
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* N/A
|-
! style="background:#DCDCDC;" align="center" + |[[Influenza]]<ref name="pmid6687269">{{cite journal |vauthors=Bove KE, Hilton PK, Partin J, Farrell MK |title=Morphology of acute myopathy associated with influenza B infection |journal=Pediatr Pathol |volume=1 |issue=1 |pages=51–66 |date=1983 |pmid=6687269 |doi= |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |Variable
| style="background:#F5F5F5;" align="center" + | Proximal and Distal
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="left" + |
* [[Fever]]
* [[Malaise]]
* [[Rhinorrhea]]
* [[Muscle pain]] worse with movement
| style="background:#F5F5F5;" align="left" + |
*Cold weather
*H/o Ill contacts
| style="background:#F5F5F5;" align="left" + |
* Muscle weakness, tenderness, and swelling.
| style="background:#F5F5F5;" align="left" + |
* '''↑↑''' Liver enzymes
* Positive PCR
| style="background:#F5F5F5;" align="left" + |
* '''↑↑'''
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* N/A
|-
! style="background:#DCDCDC;" align="center" + |[[Polio]]<ref name="pmid15933355">{{cite journal |vauthors=Howard RS |title=Poliomyelitis and the postpolio syndrome |journal=BMJ |volume=330 |issue=7503 |pages=1314–8 |date=June 2005 |pmid=15933355 |pmc=558211 |doi=10.1136/bmj.330.7503.1314 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |<5 yrs
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* Asymmetrical [[paralysis]]
* [[Muscle atrophy]]
* [[Tremors]]
* [[Skeletal]] deformities
| style="background:#F5F5F5;" align="left" + |
* History of skipped immunization.
| style="background:#F5F5F5;" align="left" + |
* Normal
* [[Meningeal signs]]
* Asymmetrical flaccid paralysis
* Pharyngeal paralysis
| style="background:#F5F5F5;" align="left" + |
* Isolation from [[pharyngeal]]<nowiki/>secretions, CSF
* Positive serology
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* Neurological pattern
|-
! style="background:#DCDCDC;" align="center" + |[[Syphilis]]<ref name="pmid17235095">{{cite journal |vauthors=French P |title=Syphilis |journal=BMJ |volume=334 |issue=7585 |pages=143–7 |date=January 2007 |pmid=17235095 |pmc=1779891 |doi=10.1136/bmj.39085.518148.BE |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |Variable
| style="background:#F5F5F5;" align="center" + |Negative
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* [[Chancre]]
* [[Lymphadenopathy]]
* Condylomata lata
* [[Neurosyphilis|Neuro syphilis]]
* Cardiovascular syphilis
| style="background:#F5F5F5;" align="left" + |
* History of risk factors (MSM, unprotected sex, multiple sex partners)
| style="background:#F5F5F5;" align="left" + |
* Non−tender [[chancre]] in primary syphilis.
* Followed by [[rash]]
* Generalized [[lymphadenopathy]] in secondary syphilis
| style="background:#F5F5F5;" align="left" + |
* Darkfield examinations
* VDRL
* RPR
* [[FTA-ABS|FTA−ABS]]
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* N/A
|-
! style="background:#DCDCDC;" align="center" + |[[Pyomyositis]]<ref name="pmid15380499">{{cite journal |vauthors=Crum NF |title=Bacterial pyomyositis in the United States |journal=Am. J. Med. |volume=117 |issue=6 |pages=420–8 |date=September 2004 |pmid=15380499 |doi=10.1016/j.amjmed.2004.03.031 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |Variable
| style="background:#F5F5F5;" align="center" + |Proximal<br>&<br>Distal
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* [[Fever]]
* [[Malaise]]
* [[Psoas abscess]]
| style="background:#F5F5F5;" align="left" + |
* [[Immunocompromised]]
| style="background:#F5F5F5;" align="left" + |
** Muscles are painful, swollen, tender, and indurated.
** Depending on the site of involvement, it may mimic appendicitis (psoas muscle), septic arthritis of the hip (iliacus muscle), or epidural abscess (piriformis muscle).
| style="background:#F5F5F5;" align="left" + |
* Leukocytosis
* Elevated ESR
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* N/A
|-
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Organ system
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Disease
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Age of onset
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Muscle weakness
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Fever
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Myalgia
! style="background:#4479BA; color: #FFFFFF;" align="center" + |'''Contractures'''
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Gait abnormality
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Neuropathy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Atrophy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Stiffness
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Myoglobinuria
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Other features
! style="background:#4479BA; color: #FFFFFF;" align="center" + |History
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Physical
Examination
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Laboratory Findings
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Creatine Kinase
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Muscle Biopsy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Electromyogram
|-
! rowspan="4" style="background:#DCDCDC;" align="center" + |Neurologic
! style="background:#DCDCDC;" align="center" + |[[Amyotrophic lateral sclerosis|ALS]]<ref name="pmid26629397">{{cite journal |vauthors=Zarei S, Carr K, Reiley L, Diaz K, Guerra O, Altamirano PF, Pagani W, Lodin D, Orozco G, Chinea A |title=A comprehensive review of amyotrophic lateral sclerosis |journal=Surg Neurol Int |volume=6 |issue= |pages=171 |date=2015 |pmid=26629397 |pmc=4653353 |doi=10.4103/2152-7806.169561 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |>35
| style="background:#F5F5F5;" align="center" + |Proximal<br>&<br>Distal
* Distal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* [[Dysphagia]]
* [[Spasticity]]
* [[Hyperreflexia]]
* [[Babinski's sign|Babinski's]] +
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* Both [[Upper motor neurons|upper]] and [[lower motor neuron]] signs 
| style="background:#F5F5F5;" align="left" + |
* Clinical diagnosis
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Nonspecific findings of chronic denervation with reinnervation
| style="background:#F5F5F5;" align="left" + |
* Neuropathic
|-
! style="background:#DCDCDC;" align="center" + |[[Stroke]]<ref name="pmid20412000">{{cite journal |vauthors=Baldwin K, Orr S, Briand M, Piazza C, Veydt A, McCoy S |title=Acute ischemic stroke update |journal=Pharmacotherapy |volume=30 |issue=5 |pages=493–514 |date=May 2010 |pmid=20412000 |doi=10.1592/phco.30.5.493 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |>65
| style="background:#F5F5F5;" align="center" + |Proximal<br>&<br>distal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* [[Dysphagia]]
* Unilateral/Bilateral weakness
| style="background:#F5F5F5;" align="left" + |
* H/o [[Hypertension|HTN]], [[dyslipidaemia]] [[Diabetes mellitus|DM]]
| style="background:#F5F5F5;" align="left" + |
* Weakness of the involved arm
| style="background:#F5F5F5;" align="left" + |
*Head CT
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Neuropathic
|-
! style="background:#DCDCDC;" align="center" + |[[GBS]]<ref name="pmid23628447">{{cite journal |vauthors=van Doorn PA |title=Diagnosis, treatment and prognosis of Guillain-Barré syndrome (GBS) |journal=Presse Med |volume=42 |issue=6 Pt 2 |pages=e193–201 |date=June 2013 |pmid=23628447 |doi=10.1016/j.lpm.2013.02.328 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |18  −350
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* [[Ascending paralysis]]
| style="background:#F5F5F5;" align="left" + |
* Precedes a [[Gastrointestinal diseases|gastrointestinal disease]]
| style="background:#F5F5F5;" align="left" + |
* Weakness of lower extremities followed by upper extremities
| style="background:#F5F5F5;" align="left" + |
* Cytologic albumin ratio
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* Neuropathic
|-
! style="background:#DCDCDC;" align="center" + |[[Multiple sclerosis|Multiple Sclerosis]]<ref name="pmid22605909">{{cite journal |vauthors=Goldenberg MM |title=Multiple sclerosis review |journal=P T |volume=37 |issue=3 |pages=175–84 |date=March 2012 |pmid=22605909 |pmc=3351877 |doi= |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |30's
| style="background:#F5F5F5;" align="center" + |Proximal<br>&<br>distal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* Ocular findings
* [[Urinary incontinence]]
* Problems with [[Speech and language pathology|speech]] or [[swallowing]]
| style="background:#F5F5F5;" align="left" + |
* Attacks or exacerbation
| style="background:#F5F5F5;" align="left" + |
** Localized weakness
** Focal sensory disturbances
** Hyper reactive reflexes
** Increased tone or stiffness
| style="background:#F5F5F5;" align="left" + |
* Head CT ologo−clonal bands
| style="background:#F5F5F5;" align="left" + |
* Normal
| style="background:#F5F5F5;" align="left" + |
* N/A
| style="background:#F5F5F5;" align="left" + |
* Neuropathic
|-
|-
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Organ system
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Organ system
Line 1,138: Line 317:
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Muscle Biopsy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Muscle Biopsy
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Electromyogram
! style="background:#4479BA; color: #FFFFFF;" align="center" + |Electromyogram
|-
! rowspan="3" style="background:#DCDCDC;" align="center" + |Neuromuscular
! style="background:#DCDCDC;" align="center" + |[[Botulinum]]<ref name="pmid15257512">{{cite journal |vauthors=Cherington M |title=Botulism: update and review |journal=Semin Neurol |volume=24 |issue=2 |pages=155–63 |date=June 2004 |pmid=15257512 |doi=10.1055/s-2004-830901 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |Variable
| style="background:#F5F5F5;" align="center" + |Distal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="left" + |
* [[Double vision]]
* [[Blurred vision]]
* Drooping eyelids
* [[Slurred speech]]
* [[Difficulty swallowing]]
| style="background:#F5F5F5;" align="left" + |
* H/O food exposure 
| rowspan="3" style="background:#F5F5F5;" align="left" + |
* [[Hyporeflexia]]
* Decreased strength
| style="background:#F5F5F5;" align="left" + |
* +Toxin
| rowspan="3" style="background:#F5F5F5;" align="left" + |
* Normal
| rowspan="3" style="background:#F5F5F5;" align="left" + |
* N/A
| rowspan="3" style="background:#F5F5F5;" align="left" + |
* Myopathic
|-
! style="background:#DCDCDC;" align="center" + |[[Lambert-Eaton syndrome|Lambert−Eaton syndrome]]<ref name="pmid22094130">{{cite journal |vauthors=Titulaer MJ, Lang B, Verschuuren JJ |title=Lambert-Eaton myasthenic syndrome: from clinical characteristics to therapeutic strategies |journal=Lancet Neurol |volume=10 |issue=12 |pages=1098–107 |date=December 2011 |pmid=22094130 |doi=10.1016/S1474-4422(11)70245-9 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |Variable
| style="background:#F5F5F5;" align="center" + |Distal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* Weakness of the bulbar muscles
* Ocular
* Limb weakness
| style="background:#F5F5F5;" align="left" + |
* Weaknessa is often relieved temporarily after exertion or physical exercise.
| style="background:#F5F5F5;" align="left" + |
* Antibodies against voltage−gated calcium channels 
|-
! style="background:#DCDCDC;" align="center" + |[[Myasthenia gravis]]<ref name="pmid23193443">{{cite journal |vauthors=Jayam Trouth A, Dabi A, Solieman N, Kurukumbi M, Kalyanam J |title=Myasthenia gravis: a review |journal=Autoimmune Dis |volume=2012 |issue= |pages=874680 |date=2012 |pmid=23193443 |pmc=3501798 |doi=10.1155/2012/874680 |url=}}</ref>
| style="background:#F5F5F5;" align="center" + |Variable
| style="background:#F5F5F5;" align="center" + |Proximal
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + | −
| style="background:#F5F5F5;" align="center" + | +
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="center" + |<nowiki>+</nowiki>
| style="background:#F5F5F5;" align="center" + |−
| style="background:#F5F5F5;" align="left" + |
* [[Ocular]]
* [[Bulbar]] 
* Limb weakness
* Isolated neck, limbs and respiratory weakness
| style="background:#F5F5F5;" align="left" + |
* Weakness often worsens with activity
| style="background:#F5F5F5;" align="left" + |
* Antibodies that block or destroy nicotinic [[acetylcholine receptors]] 
|}
|}



Revision as of 16:01, 8 May 2018

Polymyalgia Rheumatica Microchapters

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ahmed Elsaiey, MBBCH [2]

Overview

Polymyalgia rheumatica (PMR) must be differentiated from other conditions such as late onset rheumatoid arthritis, polymyositis, dermatomyositis, fibromyalgia, and remitting seronegative symmetrical synovitis with pitting edema.

Differentiating Polymyalgia Rheumatica from other Diseases

PMR must be differentiated from the following conditions:

  • Rheumatoid arthritis: PMR and late onset rheumatoid arthritis (RA) can initially present with similar clinical features like synovitis. These patients are treated initially as PMR with glucocorticoids. RA treatment is started when there is no improvement or when it evolves into characteristic RA or when there is a persistently raised plasma viscosity.[1] [2]
  • Malignancy (such as myeloma): Patients with malignancy sometimes present with PMR like symptoms and have poor response to steroid therapy.[5] This is in fact paraneoplastic syndrome presenting as PMR.[6]
  • Fibromyalgia: Fibromyalgia occurs in age groups 20-50 years. Patients have characteristic tender points. Unlike PMR, the active phase proteins and ESR are normal.
  • Hypothyroidism: Patients with hypothyroidism muscle and joint pain and weakness similar to PMR. Delayed relaxation of deep tendon reflexes is seen in hypothyroidism with elevated TSH levels and low T4 levels.

Differentiating polymyalgia rheumatica on the basis of fatigue and chronic pain

Disease Differentiating signs and symptoms Diagnostic findings
Polymyalgia rheumatica
Fibromyalgia
  • All lab tests are normal
Rheumatoid arthritis
SLE
Chronic fatigue syndrome Fatigue plus 4 of the following symptoms:
  • Diagnosis of exclusions
  • Symptoms must present for more than 6 months
Spondyloarthritis
Osteoarthritis
  • Degenerative joint changes on x-ray
Hypothyroidism
Polymyositis and dermatomyositis
Neuropathy

Differentiating polymyalgia rheumatica from other causes of inflammatory myopathy

Organ system Disease Symptoms History Physical

Examination

Diagnosis
Age of onset Muscle weakness Fever Myalgia Contractures Gait abnormality Neuropathy Atrophy Stiffness Myoglobinuria Other features Laboratory Findings Creatine Kinase Muscle Biopsy Electromyogram
Inflammatory/ Rheumatologic Polymyalgia Rheumatica[8] 50s Diffuse + + +
  • History of joints stiffness, worse in the morning
  • Restricted shoulder motion
  • Normal
  • Normal
Dermatomyositis[9] 40s−50s
Can affect children
Proximal + + +
  • ↑↑
  • Perimysial mononuclear infiltrate
Polymyositis[10] > 18 years Proximal + + +
  • N/A
  • N/A
  • ↑↑
  • Endomysial mononuclear infiltrate
  • Patchy necrosis
Inclusion body myositis[11] 50s Proximal
&
distal
  • N/A
  • Antibodies to cytoplasmic 5'−nucleotidase
  • ↑↑
Fibromyalgia[12] 40−50s Generalized +
  • Normal
  • Normal
  • Normal
  • Normal
Organ system Disease Age of onset Muscle weakness Fever Myalgia Contractures Gait abnormality Neuropathy Atrophy Stiffness Myoglobinuria Other features History Physical

Examination

Laboratory Findings Creatine Kinase Muscle Biopsy Electromyogram

References

  1. Pease CT, Haugeberg G, Montague B; et al. (2009). "Polymyalgia rheumatica can be distinguished from late onset rheumatoid arthritis at baseline: results of a 5-yr prospective study". Rheumatology (Oxford). 48 (2): 123–7. doi:10.1093/rheumatology/ken343. PMID 18980958. Unknown parameter |month= ignored (help)
  2. Pease CT, Haugeberg G, Morgan AW, Montague B, Hensor EM, Bhakta BB (2005). "Diagnosing late onset rheumatoid arthritis, polymyalgia rheumatica, and temporal arteritis in patients presenting with polymyalgic symptoms. A prospective longterm evaluation". J. Rheumatol. 32 (6): 1043–6. PMID 15940765. Unknown parameter |month= ignored (help)
  3. Sørensen CD, Hansen LH, Hørslev-Petersen K (2010). "[Myositis as differential diagnosis in polymyalgia rheumatica]". Ugeskr. Laeg. (in Danish). 172 (42): 2899–900. PMID 21040663. Unknown parameter |month= ignored (help)
  4. Hopkinson ND, Shawe DJ, Gumpel JM (1991). "Polymyositis, not polymyalgia rheumatica". Ann. Rheum. Dis. 50 (5): 321–2. PMC 1004419. PMID 2042988. Unknown parameter |month= ignored (help)
  5. Manganelli P, Borghi L, Coruzzi P, Novarini A, Ambanelli U (1986). "[Paraneoplastic polymyalgia rheumatica. Case contribution]". Minerva Med. (in Italian). 77 (38): 1739–41. PMID 3774196. Unknown parameter |month= ignored (help)
  6. Kwiatkowska B, Filipowicz-Sosnowska A (2008). "[Polymyalgia rheumatica mimicking neoplastic disease--significant problem in elderly patients]". Pol. Arch. Med. Wewn. (in Polish). 118 Suppl: 47–9. PMID 19562970.
  7. Auzary C, Le Thi Huong D, Delarbre X; et al. (2006). "Subacute bacterial endocarditis presenting as polymyalgia rheumatica or giant cell arteritis". Clin. Exp. Rheumatol. 24 (2 Suppl 41): S38–40. PMID 16859595.
  8. Myklebust G, Gran JT (1996). "A prospective study of 287 patients with polymyalgia rheumatica and temporal arteritis: clinical and laboratory manifestations at onset of disease and at the time of diagnosis". Br J Rheumatol. 35 (11): 1161–8. PMID 8948307.
  9. Dalakas MC (1991). "Polymyositis, dermatomyositis and inclusion-body myositis". N Engl J Med. 325 (21): 1487–98. doi:10.1056/NEJM199111213252107. PMID 1658649.
  10. Dalakas MC (1991). "Polymyositis, dermatomyositis and inclusion-body myositis". N Engl J Med. 325 (21): 1487–98. doi:10.1056/NEJM199111213252107. PMID 1658649.
  11. Dalakas MC (1991). "Polymyositis, dermatomyositis and inclusion-body myositis". N Engl J Med. 325 (21): 1487–98. doi:10.1056/NEJM199111213252107. PMID 1658649.
  12. Ohara N, Katada S, Yamada T, Mezaki N, Suzuki H, Suzuki A, Hanyu O, Yoneoka Y, Kawachi I, Shimohata T, Kakita A, Nishizawa M, Sone H (2016). "Fibromyalgia in a Patient with Cushing's Disease Accompanied by Central Hypothyroidism". Intern. Med. 55 (21): 3185–3190. doi:10.2169/internalmedicine.55.5926. PMC 5140872. PMID 27803417.

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