Ulnar Deviation

Ulnar deviation, also known as ulnar drift, is a progressive deformity of the hand caused by the swelling of the metacarpophalangeal joints (knuckles), which results in the fingers bending towards the little finger side of the hand while the wrist bones deviate towards the thumb side. The primary cause of ulnar deviation is rheumatoid arthritis, although other conditions such as systemic lupus erythematosus or psoriatic arthritis may also be responsible. Very rarely, synovitis can also cause the condition.

Learn More