ulnar styloid impaction syndrome
nicht verwechseln mit: ulnar impingement syndromeUlnar styloid impaction syndrome refers to wrist pain due to a long ulnar styloid process impacting upon the triquetral bone.
Pathology
An ulnar styloid >6 mm in length is commonly regarded as being long. Impaction results in chondromalacia of the opposing articular surfaces, i.e. the proximal pole of the triquetral bone and ulnar styloid tip.
Chronic impaction can lead to lunotriquetral instability. The triangular fibrocartilage complex (TFCC) is usually intact.
Treatment and prognosis
Surgical removal of the ulnar styloid process can effectively treat the condition.
Differential diagnosis
A similar but distinct impaction syndrome due to non-union of the ulnar styloid (commonly following fracture) can also occur. This syndrome more commonly involves disruption of the TFCC complex.
See also
Siehe auch:
Assoziationen und Differentialdiagnosen zu ulnar styloid impaction syndrome:
