Fever of unknown origin differential diagnosis
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Synonyms and keywords: febris continua e causa ignota; febris e causa ignota; febris E.C.I.; FUO; PUO; pyrexia of unknown origin
Overview
- Fever can be the presenting symptom with many diseases, it is therefore important to differentiate fever of unknown origin from all those diseases which present with fever.
- Because of the broad range of differential diagnosis they can be grouped into four categories based on their etiology.
- Infectious
- Malignant
- Inflammatory
- Miscellaneous[1]
Differential diagnosis
Infectious
These patients mostly have a history of hospitalization, surgical procedures, contact with infected person or travel to an endemic place.[2][3]
Examples include:
- Lyme disease
- Histoplasmosis
- Q fever
- Brucellosis
- Toxoplasmosis
- Leptospirosis
- Ehrlichiosis
- Anaplasmosis
- Tuberculosis
- Infectious mononucleosis
- mycobacterium avium infection etc.
Malignant
They are mostly accompanied by loss of weight, decrease in appetite, lymph node enlargement and aquagenic pruritic mostly occurring after hot shower.
Examples include:
- Hodgkin lymphoma
- myeloproliferative disorders
- Colorectal carcinoma
- Hepatocellular carcinoma
- Renal cell carcinoma
- carcinoma of CNS
- Sarcoma etc.
Autoinflammatory/Rheumatologic
Mostly they have multi organ involvement and lymphadenopathy along with joint symptoms may be present.[4][5]
Examples include:
Miscellaneous
Mostly does not belong to any of the above.
Examples include:
[Disease name] must be differentiated from other diseases that cause [clinical feature 1], [clinical feature 2], and [clinical feature 3], such as [differential dx1], [differential dx2], and [differential dx3].
OR
[Disease name] must be differentiated from [differential dx1], [differential dx2], and [differential dx3].
OR
As [disease name] manifests in a variety of clinical forms, differentiation must be established in accordance with the particular subtype. [Subtype name 1] must be differentiated from other diseases that cause [clinical feature 1], such as [differential dx1] and [differential dx2]. In contrast, [subtype name 2] must be differentiated from other diseases that cause [clinical feature 2], such as [differential dx3] and [differential dx4].
Differentiating [disease name] from other diseases on the basis of [symptom 1], [symptom 2], and [symptom 3]
On the basis [symptom 1], [symptom 2], and [symptom 3], [disease name] must be differentiated from [disease 1], [disease 2], [disease 3], [disease 4], [disease 5], and [disease 6].
| Diseases | Clinical manifestations | Para-clinical findings | Gold standard | Additional findings | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Symptoms | Physical examination | ||||||||||||||
| Lab Findings | Imaging | Histopathology | |||||||||||||
| Symptom 1 | Symptom 2 | Symptom 3 | Physical exam 1 | Physical exam 2 | Physical exam 3 | Elevated WBCs | Elevated
ESR |
Lab 3 | Imaging 1 | Imaging 2 | Imaging 3 | ||||
| Subacute bacterial endocarditis | night sweats | weight loss | joints pain | Heart murmer | Roth spots | splinter hemorrhages | + | + | |||||||
| Differential Diagnosis 2 | |||||||||||||||
| Differential Diagnosis 3 | |||||||||||||||
| Diseases | Symptom 1 | Symptom 2 | Symptom 3 | Physical exam 1 | Physical exam 2 | Physical exam 3 | Lab 1 | Lab 2 | Lab 3 | Imaging 1 | Imaging 2 | Imaging 3 | Histopathology | Gold standard | Additional findings |
| Differential Diagnosis 4 | |||||||||||||||
| Differential Diagnosis 5 | |||||||||||||||
| Differential Diagnosis 6 | |||||||||||||||
References
- ↑ Cunha, Burke A.; Lortholary, Olivier; Cunha, Cheston B. (2015). "Fever of Unknown Origin: A Clinical Approach". The American Journal of Medicine. 128 (10): 1138.e1–1138.e15. doi:10.1016/j.amjmed.2015.06.001. ISSN 0002-9343.
- ↑ Cunha, Burke A.; Lortholary, Olivier; Cunha, Cheston B. (2015). "Fever of Unknown Origin: A Clinical Approach". The American Journal of Medicine. 128 (10): 1138.e1–1138.e15. doi:10.1016/j.amjmed.2015.06.001. ISSN 0002-9343.
- ↑ Salzberger B, Schneidewind A, Hanses F, Birkenfeld G, Müller-Schilling M (2012). "[Fever of unknown origin. Infectious causes]". Internist (Berl). 53 (12): 1445–53, quiz 1454-5. doi:10.1007/s00108-012-3173-8. PMID 23111594.
- ↑ Kümmerle-Deschner JB (2017). "[Autoinflammatory Diseases as a Differential Diagnosis of Fever of Unknown Origin]". Dtsch Med Wochenschr. 142 (13): 969–978. doi:10.1055/s-0043-103468. PMID 28672419.
- ↑ Mulders-Manders CM, Simon A, Bleeker-Rovers CP (2016). "Rheumatologic diseases as the cause of fever of unknown origin". Best Pract Res Clin Rheumatol. 30 (5): 789–801. doi:10.1016/j.berh.2016.10.005. PMID 27964789.