Posttraumatic Arthrosis and Triquetral Nonunion Associated With Pisotriquetral Subluxation in Adolescent Female Softball Players.

Impaction fracture subluxation of the pisotriquetral joint producing arthrosis and ulnar triquetral osteochondral nonunion is a cause for ulnar wrist pain in batting athletes. Two cases of adolescent female softball players managed successfully with pisiform and triquetral fragment excision are reported.