Diseases and usual joints affected
Gout-mtp of great toe
Pseudogout-knee
Rheumatoid arthritis - metacarpophalangeal joint
Ankylosing spondylitis-sacroiliac joint
Septic arthritis-knee
Syphilitic arthritis -knee
Gonococcal arthritis - knee
Diabetic Charcot joint -foot joint
Senile osteoporosis- vertebra
Paget’s disease- pelvis
Osteochondrosis dessicans - knee
Actinomycosis - mandible
Hemophilic arthritis - knee