Table 3.
Final diagnoses of 50 patients with fever of unknown origin (FUO).
| Diagnostic Categories | n (%) |
|---|---|
| Infections | 20 (40%) |
| Abdominal abscesses | 4 |
| Infectious cyst in polycystic renal disease | 3 |
| Pneumonia/inflammation of bronchiectasis cysts | 3 |
| Vascular graft infection | 3 |
| Tuberculous spondylitis | 1 |
| Bacterial spondylodiscitis | 1 |
| Pulmonary tuberculosis | 1 |
| CIED-associated infection | 1 |
| Infectious lymphadenopathy | 1 |
| Cryptococcosis | 1 |
| Leishmaniasis | 1 |
| Malignancy | 8 (16%) |
| Non-Hodgkin’s lymphoma | 5 |
| Hodgkin’s disease | 1 |
| Lung cancer | 1 |
| Relapse of urinary tract carcinoma | 1 |
| Non-infectious Inflammatory diseases (NIID) | 11 (22%) |
| Large vessel vasculitis/Takayasu’s arteritis | 3 |
| Adult-onset Still’s disease | 2 |
| Sarcoidosis | 1 |
| Polymyalgia rheumatica | 1 |
| Inflammatory bowel disease | 1 |
| Familial Mediterranean fever | 1 |
| Neo-esophagus inflammation from gastroesophageal reflux | 1 |
| Subacute thyroiditis | 1 |
| Undiagnosed fever | 11 (22%) |
| Spontaneous recovery of fever | 7 |
| Recovery of fever with corticosteroids or NSAIDs | 3 |
| Recurrent fever until death | 1 |
n, number of patients; CIED, cardiac implantable electronic device; NSAIDs, non-steroidal anti-inflammatory drugs.