Non-infective causes of pyrexia of unknown origin
| Category | Aetiology |
|---|---|
| Inflammatory disorders | Behçet's disease |
| Familial Mediterranean fever | |
| Felty's syndrome | |
| Giant cell arteritis and temporal arteritis | |
| Gout and pseudogout | |
| Granulomatosis with polyangiitis (Wegener's disease) | |
| Polyarteritis nodosa | |
| Polymyositis | |
| Rheumatoid arthritis | |
| Sarcoidosis | |
| Still's disease | |
| Systemic lupus erythematosus | |
| Takayasu's arteritis | |
| Solid tumours | Atrial myxoma |
| Colonic cancer | |
| Hepatic carcinoma | |
| Metastatic disease | |
| Pancreatic cancer | |
| Renal cell carcinoma | |
| Haematological malignancy | Leukaemia |
| Lymphoma | |
| Multiple myeloma | |
| Myeloproliferative disorders | |
| Miscellaneous | Drug fever |
| Factitious fever | |
| Hypoadrenalism | |
| Hypothalamic dysfunction | |
| Inflammatory bowel disease | |
| Thyroiditis |