Filariasis differential diagnosis: Difference between revisions

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==Differentiating filariasis from other diseases==
==Differentiating filariasis from other diseases==
Lymphatic filariasis must be differentiated from other causes of lower limb edema like [[chronic venous insufficiency]], acute deep venous thrombosis, [[lipedema]], [[myxedema]], [[cellulitis]] and causes of [[generalized edema]].
Lymphatic filariasis must be differentiated from other causes of [[lower limb]] [[edema]] like [[chronic venous insufficiency]], acute [[Deep vein thrombosis|deep venous thrombosis]], [[lipedema]], [[myxedema]], [[cellulitis]] and causes of [[generalized edema]].
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* History of untreated varicose veins
* History of untreated [[varicose veins]]
* Painful bilateral lower limb swelling increase with standing and decreased by rest and leg elevation.
* Painful bilateral [[lower limb]] [[swelling]] that increases with standing and decreases by rest and [[leg]] elevation.
|Chronic
|Chronic
|<nowiki>+</nowiki>
|<nowiki>+</nowiki>
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* Typical varicose veins
* Typical varicose veins
* Skin change distribution correlate with varicose veins sites in the medial side of ankle and leg
* [[Skin]] change distribution correlate with varicose veins sites in the medial side of [[ankle]] and [[leg]]
* Reduction of swelling with limb elevation.
* Reduction of [[swelling]] with limb elevation.
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* [[Duplex ultrasound]] will demonstrate typical findings of venous valvular insufficiency
* [[Duplex ultrasound]] will demonstrate typical findings of [[Venous insufficiency|venous valvular insufficiency]]
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|[[Deep venous thrombosis|Acute deep venous thrombosis]]
|[[Deep venous thrombosis|Acute deep venous thrombosis]]
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* History of prolonged recumbency
* History of prolonged recumbency
* Classic symptoms of [[DVT]] include acute unilateral swelling, pain, and erythema   
* Classic symptoms of [[DVT]] include acute unilateral [[swelling]], [[pain]], and [[erythema]]  
|Acute
|Acute
| +
| +
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|May be associated with primary disease mandates recumbency for long duration
|May be associated with primary disease mandates recumbency for long duration
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* Dilated superficial veins
* Dilated [[superficial veins]]
* Difference in calf diameter were twice as likely to have DVT(most impotant sign )<ref name="pmid16027455">{{cite journal| author=Goodacre S, Sutton AJ, Sampson FC| title=Meta-analysis: The value of clinical assessment in the diagnosis of deep venous thrombosis. | journal=Ann Intern Med | year= 2005 | volume= 143 | issue= 2 | pages= 129-39 | pmid=16027455 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=16027455  }}  [https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=16539361 Review in: ACP J Club. 2006 Mar-Apr;144(2):46-7]  [https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=17213086 Review in: Evid Based Med. 2006 Apr;11(2):56]</ref>
* Difference in [[Calf muscle|calf]] diameter is twice as likely to have [[DVT]](most impotant sign )<ref name="pmid16027455">{{cite journal| author=Goodacre S, Sutton AJ, Sampson FC| title=Meta-analysis: The value of clinical assessment in the diagnosis of deep venous thrombosis. | journal=Ann Intern Med | year= 2005 | volume= 143 | issue= 2 | pages= 129-39 | pmid=16027455 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=16027455  }}  [https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=16539361 Review in: ACP J Club. 2006 Mar-Apr;144(2):46-7]  [https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=17213086 Review in: Evid Based Med. 2006 Apr;11(2):56]</ref>
* Calf pain on passive dorsiflexion of the foot Homan's sign) isn't realiable sign.
* Calf pain on passive [[dorsiflexion]] of the [[foot]] ([[Homan's sign]]) isn't realiable sign.


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* [[Compression ultrasonography]] (CUS) with Doppler is the diagnostic test of choice
* [[Compression ultrasonography]] (CUS) with [[Doppler ultrasound|doppler]] is the diagnostic test of choice
* [[D-dimer]] level is used for unprobable cases
* [[D-dimer]] level is used for unprobable cases
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|[[Lipedema]]
|[[Lipedema]]
|Family history especially in women; X-linked dominant or autosomal dominant condition<ref name="pmid20358611">{{cite journal| author=Child AH, Gordon KD, Sharpe P, Brice G, Ostergaard P, Jeffery S et al.| title=Lipedema: an inherited condition. | journal=Am J Med Genet A | year= 2010 | volume= 152A | issue= 4 | pages= 970-6 | pmid=20358611 | doi=10.1002/ajmg.a.33313 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=20358611  }}</ref> Abnormal deposition of fat and edema and '''easy bruising'''.
|
* Family history especially in women; [[X-linked dominant]] or [[autosomal dominant]] condition.<ref name="pmid20358611">{{cite journal| author=Child AH, Gordon KD, Sharpe P, Brice G, Ostergaard P, Jeffery S et al.| title=Lipedema: an inherited condition. | journal=Am J Med Genet A | year= 2010 | volume= 152A | issue= 4 | pages= 970-6 | pmid=20358611 | doi=10.1002/ajmg.a.33313 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=20358611  }}</ref>  
* Abnormal deposition of fat and [[edema]] and [[easy bruising]].
|Chronic
|Chronic
| +
| +
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* Tender with palpation
* Tender with palpation


* Negative '''Semmer sign''' to differentiate from liphedema;<ref name="pmid23939641">{{cite journal| author=Trayes KP, Studdiford JS, Pickle S, Tully AS| title=Edema: diagnosis and management. | journal=Am Fam Physician | year= 2013 | volume= 88 | issue= 2 | pages= 102-10 | pmid=23939641 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=23939641  }}</ref>
* Negative '''Semmer sign''' to differentiate from lymphedema.<ref name="pmid23939641">{{cite journal| author=Trayes KP, Studdiford JS, Pickle S, Tully AS| title=Edema: diagnosis and management. | journal=Am Fam Physician | year= 2013 | volume= 88 | issue= 2 | pages= 102-10 | pmid=23939641 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=23939641  }}</ref>
* Pinching the skin on the upper surface of the toes. If it is possible to grasp a thin fold of tissue the it is negative result. In a positive result, it is only possible to grasp a lump of tissue.
* Pinching the [[skin]] on the upper surface of the [[toes]]. If it is possible to grasp a thin fold of [[tissue]] then it is negative result.
* In a positive result, it is only possible to grasp a [[lump]] of [[tissue]].


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* MRI offers strong qualitative and quantitative parameters in the diagnosis of lipedema <ref name="pmid9412843">{{cite journal| author=Dimakakos PB, Stefanopoulos T, Antoniades P, Antoniou A, Gouliamos A, Rizos D| title=MRI and ultrasonographic findings in the investigation of lymphedema and lipedema. | journal=Int Surg | year= 1997 | volume= 82 | issue= 4 | pages= 411-6 | pmid=9412843 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=9412843  }}</ref>
* MRI offers strong qualitative and quantitative parameters in the diagnosis of [[lipedema]] <ref name="pmid9412843">{{cite journal| author=Dimakakos PB, Stefanopoulos T, Antoniades P, Antoniou A, Gouliamos A, Rizos D| title=MRI and ultrasonographic findings in the investigation of lymphedema and lipedema. | journal=Int Surg | year= 1997 | volume= 82 | issue= 4 | pages= 411-6 | pmid=9412843 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=9412843  }}</ref>
|-
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|[[Myxedema]]
|[[Myxedema]]
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* History of untreated hypothyroidism
* History of untreated [[hypothyroidism]].
* Infiltration of the skin with [[Glycosaminoglycan|glycosaminoglycans]] with associated water retention
* Infiltration of the skin with [[Glycosaminoglycan|glycosaminoglycans]] with associated water retention.
|Chronic
|Chronic
| +
| +
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([[hypothyroidism]] )
([[hypothyroidism]] )
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* Pretibial myxedema
* [[Pretibial myxedema]]
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* Thyroid function tests.
* [[Thyroid function tests|Thyroid function tests.]]
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|([[Cellulitis]]-[[Erysipelas|erysipelas-]]<nowiki/>[[skin abscess]])
|([[Cellulitis]]-[[Erysipelas|erysipelas-]]<nowiki/>[[skin abscess]])
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* Acute painful swelling and may be fever
* Acute painful [[swelling]]
* [[Fever]]
|Acute
|Acute
| +
| +
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| -
| -
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* Tenderness,hotness and may be flactuation if abscess formed.
* [[Tenderness]], hotness, and may be fluctuation if [[abscess]] formed.
* Lymphangitis in nearby lymph nodes.
* [[Lymphangitis]] in nearby [[Lymph node|lymph nodes]].
* Toxemia and fever in severe cases.
* [[Toxemia]] and [[fever]] in severe cases.
* Cellulitis involves the deeper dermis erysipelas involves the upper dermis.<ref name="pmid24947530">{{cite journal| author=Stevens DL, Bisno AL, Chambers HF, Dellinger EP, Goldstein EJ, Gorbach SL et al.| title=Practice guidelines for the diagnosis and management of skin and soft tissue infections: 2014 update by the infectious diseases society of America. | journal=Clin Infect Dis | year= 2014 | volume= 59 | issue= 2 | pages= 147-59 | pmid=24947530 | doi=10.1093/cid/ciu296 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=24947530  }}</ref>
* [[Cellulitis]] involves the deeper [[dermis]] and [[erysipelas]] involves the upper dermis.<ref name="pmid24947530">{{cite journal| author=Stevens DL, Bisno AL, Chambers HF, Dellinger EP, Goldstein EJ, Gorbach SL et al.| title=Practice guidelines for the diagnosis and management of skin and soft tissue infections: 2014 update by the infectious diseases society of America. | journal=Clin Infect Dis | year= 2014 | volume= 59 | issue= 2 | pages= 147-59 | pmid=24947530 | doi=10.1093/cid/ciu296 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=24947530  }}</ref>
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* Usually it doesn't need any laboratory tests to diagnose.<ref name="pmid27434444">{{cite journal| author=Raff AB, Kroshinsky D| title=Cellulitis: A Review. | journal=JAMA | year= 2016 | volume= 316 | issue= 3 | pages= 325-37 | pmid=27434444 | doi=10.1001/jama.2016.8825 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=27434444  }}</ref>
* Usually it doesn't need any laboratory tests to diagnose.<ref name="pmid27434444">{{cite journal| author=Raff AB, Kroshinsky D| title=Cellulitis: A Review. | journal=JAMA | year= 2016 | volume= 316 | issue= 3 | pages= 325-37 | pmid=27434444 | doi=10.1001/jama.2016.8825 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=27434444  }}</ref>
* Blood cultures are warranted for patients in the following circumstances:<ref name="pmid10834819">{{cite journal| author=Woo PC, Lum PN, Wong SS, Cheng VC, Yuen KY| title=Cellulitis complicating lymphoedema. | journal=Eur J Clin Microbiol Infect Dis | year= 2000 | volume= 19 | issue= 4 | pages= 294-7 | pmid=10834819 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=10834819  }}</ref>
* [[Blood cultures]] are warranted for patients in the following circumstances:<ref name="pmid10834819">{{cite journal| author=Woo PC, Lum PN, Wong SS, Cheng VC, Yuen KY| title=Cellulitis complicating lymphoedema. | journal=Eur J Clin Microbiol Infect Dis | year= 2000 | volume= 19 | issue= 4 | pages= 294-7 | pmid=10834819 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=10834819  }}</ref>
# Systemic toxicity
# [[Toxicity|Systemic toxicity]]
# Extensive skin or soft tissue involvement
# Extensive [[skin]] or [[soft tissue]] involvement
# Underlying comorbidities  
# Underlying [[comorbidities]]
# persistent cellulitis
# persistent [[cellulitis]]
* ''In patients with recurrent cellulitis, serologic testing for [[beta-hemolytic streptococci]] is a good diagnostic tool.''<ref name="pmid4005155">{{cite journal| author=Leppard BJ, Seal DV, Colman G, Hallas G| title=The value of bacteriology and serology in the diagnosis of cellulitis and erysipelas. | journal=Br J Dermatol | year= 1985 | volume= 112 | issue= 5 | pages= 559-67 | pmid=4005155 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=4005155  }}</ref>
* In patients with recurrent [[cellulitis]], serologic ''testing for [[beta-hemolytic streptococci]]'' is a good diagnostic tool''.''<ref name="pmid4005155">{{cite journal| author=Leppard BJ, Seal DV, Colman G, Hallas G| title=The value of bacteriology and serology in the diagnosis of cellulitis and erysipelas. | journal=Br J Dermatol | year= 1985 | volume= 112 | issue= 5 | pages= 559-67 | pmid=4005155 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=4005155  }}</ref>
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|Other causes of generalized edema
|Other causes of [[generalized edema]]
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* History of chronic general condition(cardiac-liver-renal)
* History of chronic general condition (cardiac-liver-renal)
|Chronic
|Chronic
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| -
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* According to the primary cause ( Echo- LFT- RFT)
* According to the primary cause ( Echo- [[LFTs]]- RFT)
|}
|}


==References==
==References==
{{reflist|2}}
{{reflist|2}}

Revision as of 16:41, 27 July 2017

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Mohammed Abdelwahed M.D[2]

Overview

Lymphatic filariasis must be differentiated from other causes of lower limb edema, such as chronic venous insufficiency, acute deep venous thrombosis, lipedema, myxedema, cellulitis and causes of generalized edema.

Differentiating filariasis from other diseases

Lymphatic filariasis must be differentiated from other causes of lower limb edema like chronic venous insufficiency, acute deep venous thrombosis, lipedema, myxedema, cellulitis and causes of generalized edema.

Diseases Symptoms Signs Gold standard Investigation to diagnose
History Onset Pain Fever Laterality Scrotal swelling Symptoms of primary disease
Lymphatic filariasis
  • History of living in endemic area or travelling to it
 Chronic + + Bilateral + -

Preparing blood smears

  • Thick smears
  1. Thick smears consist of a thick layer of dehemoglobinized (lysed) red blood cells (RBCs).
  2. Thick smears allow a more efficient detection of parasites (increased sensitivity).
  • Thin smears consist of blood spread in a layer such that the thickness decrease.

By the ultrasound, the following findings can be observed:

  • Dilated lymphatic channels
  • Living worms tend to be in motion which called "filarial dance" sign.
Chronic venous insufficiency Chronic + - Bilateral +

(If congenial)

-
  • Typical varicose veins
  • Skin change distribution correlate with varicose veins sites in the medial side of ankle and leg
  • Reduction of swelling with limb elevation.
Acute deep venous thrombosis Acute + - Unilateral - May be associated with primary disease mandates recumbency for long duration
Lipedema Chronic + - Bilateral - -
  • Tender with palpation
  • Negative Semmer sign to differentiate from lymphedema.[3]
  • Pinching the skin on the upper surface of the toes. If it is possible to grasp a thin fold of tissue then it is negative result.
  • In a positive result, it is only possible to grasp a lump of tissue.
  • MRI offers strong qualitative and quantitative parameters in the diagnosis of lipedema [4]
Myxedema Chronic + - Bilateral - +

(hypothyroidism )

(Cellulitis-erysipelas-skin abscess) Acute + + Unilateral - -
  • Usually it doesn't need any laboratory tests to diagnose.[6]
  • Blood cultures are warranted for patients in the following circumstances:[7]
  1. Systemic toxicity
  2. Extensive skin or soft tissue involvement
  3. Underlying comorbidities
  4. persistent cellulitis
Other causes of generalized edema
  • History of chronic general condition (cardiac-liver-renal)
 Chronic - - Bilateral - +
  • According to the primary cause ( Echo- LFTs- RFT)

References

  1. ↑ Goodacre S, Sutton AJ, Sampson FC (2005). "Meta-analysis: The value of clinical assessment in the diagnosis of deep venous thrombosis". Ann Intern Med. 143 (2): 129–39. PMID 16027455. Review in: ACP J Club. 2006 Mar-Apr;144(2):46-7 Review in: Evid Based Med. 2006 Apr;11(2):56
  2. ↑ Child AH, Gordon KD, Sharpe P, Brice G, Ostergaard P, Jeffery S; et al. (2010). "Lipedema: an inherited condition". Am J Med Genet A. 152A (4): 970–6. doi:10.1002/ajmg.a.33313. PMID 20358611.
  3. ↑ Trayes KP, Studdiford JS, Pickle S, Tully AS (2013). "Edema: diagnosis and management". Am Fam Physician. 88 (2): 102–10. PMID 23939641.
  4. ↑ Dimakakos PB, Stefanopoulos T, Antoniades P, Antoniou A, Gouliamos A, Rizos D (1997). "MRI and ultrasonographic findings in the investigation of lymphedema and lipedema". Int Surg. 82 (4): 411–6. PMID 9412843.
  5. ↑ Stevens DL, Bisno AL, Chambers HF, Dellinger EP, Goldstein EJ, Gorbach SL; et al. (2014). "Practice guidelines for the diagnosis and management of skin and soft tissue infections: 2014 update by the infectious diseases society of America". Clin Infect Dis. 59 (2): 147–59. doi:10.1093/cid/ciu296. PMID 24947530.
  6. ↑ Raff AB, Kroshinsky D (2016). "Cellulitis: A Review". JAMA. 316 (3): 325–37. doi:10.1001/jama.2016.8825. PMID 27434444.
  7. ↑ Woo PC, Lum PN, Wong SS, Cheng VC, Yuen KY (2000). "Cellulitis complicating lymphoedema". Eur J Clin Microbiol Infect Dis. 19 (4): 294–7. PMID 10834819.
  8. ↑ Leppard BJ, Seal DV, Colman G, Hallas G (1985). "The value of bacteriology and serology in the diagnosis of cellulitis and erysipelas". Br J Dermatol. 112 (5): 559–67. PMID 4005155.
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