Fever of Unknown Origin Causes by Age

Aka: Fever of Unknown Origin Causes by Age

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II. Causes: Age <6 years old

  1. Infections (65%)
  2. Neoplastic Disease (8%)
  3. Autoimmune Disease (8%)
  4. Miscellaneous (13%)
  5. No Diagnosis (6%)

III. Causes: Age 6 to 14 years old

  1. Infections (38%)
  2. Neoplastic Disease (4%)
  3. Autoimmune Disease (23%)
  4. Miscellaneous (17%)
  5. No Diagnosis (19%)

IV. Causes: Age >14 years old

  1. Infections (36%)
  2. Neoplastic Disease (19%)
  3. Autoimmune Disease (13%)
  4. Miscellaneous (25%)
  5. No Diagnosis (7%)

V. Causes: Age >65 years old

  1. Connective Tissue Disease (30%)
    1. Temporal Arteritis
    2. Polymyalgia Rheumatica
  2. Infection (25%)
  3. Cancer (12%)
  4. No Diagnosis (8%)
  5. Reference
    1. Knockhaert (1993) J Am Geriatr Soc 41:1187-92 [PubMed]

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