Definition of "Fever of unknown origin"

Last modified: 5 days

Fever of unknown origin (FUO, aka pyrexia of unknown origin, PUO, febris e causa ignota, febris ECI) is a condition where the patient has a fever (elevated temperature), but despite Ix by a doctor, no explanation has been found.

  • Infection:
    • Localized pyogenic infections
    • Intravascular infections
    • Systemic bacterial infections
    • Mycobacterial infections
    • Other bacterial infections
    • Rickettsial infections
    • Chlamydial infections
    • Viral infections
    • Fungal infections
    • Parasitic infections
  • Neoplasm:
    • Hematologic malignancies
    • Solid tumors
    • Benign
  • Noninfectious inflammatory:
    • Systemic rheumatic and autoimmune diseases
    • Vasculitis
    • Granulomatous diseases
    • Autoinflammatory syndromes
  • Inherited and metabolic diseases
  • Thermoregulatory disorders
  • Habitual hypothermia
  • Miscellaneous
  • Dx of exclusion, i.e. eliminating all possibilitie suntil only 1 explanation remains, taking this as the correct one

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Definition of Fever of unknown origin | Autoprac

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