Abstract
Background Ulnar styloid impaction syndrome (USIS) is produced by the tip of an oversized ulnar
styloid inappropriately contacting the triquetrum. This condition results in chondromalacia,
synovitis, and ulnar-sided wrist pain.
Case Description We report a rare case of bilateral USIS that presented with a prolonged course. The
patient's symptoms resolved in both wrists following two separate ulnar styloidectomy
procedures.
Literature Review Our case differs from previous reports in that it involves a patient whose own history
of USIS led to a timelier diagnosis of the same disease in the contralateral wrist.
To the best of our knowledge, there are no prior reports of bilateral USIS.
Clinical Relevance USIS remains an uncommon cause of ulnar-sided wrist pain and a particularly difficult
diagnosis to confirm. Here, we illustrate that this syndrome can be confidently approached
using a combination of careful attention to patient history, physical examination,
and various imaging methods.
Keywords
ulnar styloid - syndrome - impaction - bilateral - ulnar-sided wrist pain
