Differential diagnosis
Common
Infrequent
- Acute pyelonephritis
- Polymyalgia rheumatica
- Acute pancreatitis
- Campylobacter infection
- Rheumatoid arthritis
- Non-typhoidal Salmonella
- Myocarditis
- Osteomyelitis
- Septic arthritis in adults
- Subacute (De Quervain's) thyroiditis
- Crohn's disease
- Ulcerative colitis
- Lung cancer
- Tuberculosis
- Psoriatic arthropathy
- Henoch-Schonlein purpura
- Myeloma
- Infective endocarditis
- Microscopic colitis
Rare
- Cryptogenic organizing pneumonia
- Septic arthritis in children
- Rheumatic fever
- Familial Mediterranean Fever
- Still's disease in adults
- Legionella pneumonia
- Iliopsoas abscess
- Psittacosis
- Takayasu's arteritis
- Eosinophilic granulomatosis with polyangiitis
- Mixed connective tissue disease
- Whipple's disease
Specific differential diagnosis
TYPES
Raised CRPRaised ESR