抄録
Snapping wrist is a rare and unique condition. Two cases are reported.
Case 1: A 64-year-old female had an eight-month history of snapping phenomenon on the flexion of the right ring and little fingers. She also complained of pain at her right wrist. On examination, there was a hard mass in the palmar side of her right wrist. When the carpal tunnel was explored at operation, a 1.0cm×2.0cm white tumor was found, arising from the synovial tissue around the profundus tendon to the ring finger. The tumor was removed, and triggering completely disappeared after the surgery. The histological diagnosis was fibroma of the tendon sheath.
Case 2: A 12-year-old female had a three-year history of snapping at the wrist induced by right wrist motion. She also suffered from pain and swelling of her right wrist. In this case, snapping was caused by wrist on supination-dorsoradial flexion. Radiograph was interpreted as negative. She was treated with conservative medication and was warned against wrist motion to induce snapping. Two weeks after the first examination, swelling and pain were relieved but we lost follow-up on her progress.
