D/D Arthralgia/ arthritis

Arthralgia/arthritis

Probability diagnosis

Osteoarthritis
Viral polyarthritis (et. hepatitis, parvovirus)

Serious disorders not to be missed

Infection:

Rheumatic fever
Endocarditis
Brucellosis
Septic arthritis: gonococcus, Staphylococcus
HIV arthropathy
Dengue fever

Cancer:

Bronchogenic carcinoma
Leukaemia/lymphoma
Secondary malignancy

Other:

Rheumatoid arthritis
Connective tissue disorders: SLE, scleroderma, polymyositis and dermatomyositis

Often missed:

Spondyloarthropathies (e.g. psoriasis)
Fibromyalgia
Polymyalgia rheumatica
Gout
Pseudogout
Hemarthrosis
Dengue fever
Lyme disease
Ross River virus
Avascular necrosis

Rare:

Vasculitis (e.g. polyarteritis nodosa).
Haemochromatosis
Sarcoidosis
Whipple disease.
Hyperparathyroidism
Mediterranean fever
Amyloidosis