Subcutaneous Rupture of the Flexor Tendon Associated with Nonunion of the Hook of the Hamate. A Case Report.

Subcutaneous rupture of the flexor tendons in the hand other than rheumatoid arthritis is rare. We report a case who was suffered from subcutaneous rupture of the flexor digitorum superficialis (FDS) and flexor digitorum profundus (FDP) to the little finger associated with nonunion of the hook of the hamate. The patient was a 63-year-old man. He suddenly noticed pain in his palm and difficulty in flexing his little finger during golf. He could not remember any episodes of trauma or injury that might have caused hamate fracture. His radiogram revealed nonunion of the hook of the hamate. Intraoperative findings revealed rupture of the FDS and FDP at the hamate nonunion. We removed a fragment of the hamate. Because of the myostatic contracture of the FDP, the proximal end of FDS was sutured to the distal end of the FDP with the modified Kessler method. Passive range of motion exercise was began 2 weeks after surgery. 2 years after surgery, he gained TAM of 200 degrees which classified as excel-lent after the Buck-Gramckos' criteria.