Polyarthritis causes

DD OF POLYARTHRITIS

Arthritis of unknown cause

Polyarthritis (seronegative)

Rheumatoid arthritis

Reiter's syndrome

Psoriatic arthritis

Arthritis with rheumatic fever

Arthritis with connective tissue disorders - SLE, PAN, Scleroderma

Degenerative joint disease

Osteoarthrosis

Osteoarthritis

Arthritis due to infection

Pyogenic

Non pyogenic

Traumatic arthritis

Direct

Indirect (due to incongruity and instability)

Neuropathic arthritis — Charcot's joints

Metabolic arthritis - e.g. gout

Biochemical disorders causing arthritis

Alkaptonuria

Homocystinuria

Hematological disorders causing arthritis

Hemophilia

Hemoglobinopathies

Arthritis due to endocrine disorders

Arthritis due to tumors -

Arthritis of congenital / inherited disorders

Marfan's syndrome

Ehler Dalnos syndrome

Miscellaneous - inflammatory bowel disease, hypertrophic pulmonary osteoarthropathy