"Without treatment, there is a progressive disease with marked disability of forearm function. Treatment depends on whether the distal ulna is short due to previous surgical resection or de novo negative ulnar variance. Aggressive ulnar shortening or ulnar head prostheses can be considered in cases where impingement is due to prior distal ulnar resection. Distraction lengthening of the ulna is the preferred in cases of de novo negative ulnar variance."
"The clinical presentation of ulnar impingement is similar to that of ulnar impaction; however, patients generally experience greater pain on pronation and supination. Compression of the distal radioulnar joint during forearm rotation can exacerbate symptoms and produce a characteristic grating feeling."