Ulnar variance
TechnicalDifference in length between the radius and ulna at the distal radioulnar joint, assessed on a PA projection in the neutral position. Normal values: -2 to +2 mm. Positive ulnar variance (a longer ulna) is associated with TFCC injuries and Kienböck's disease.
Go beyond the definition
With Rad Index you study with flashcards, browse all 147 full projections and the ALARA checklist — even offline, on the ward.
