Giant cell tumor of (GCT) tendon shearh is rarely seen in finger joint. We report a case of giant cell tumors occurring in the matacarpo-phalangeal joint (MPJ) of right index finger.
A 32-years-old woman accidentally struck her right index finger with a flower-pot. After the episode she noticed, she couldn't fully extend the MPJ of right index finger. She visited our clinic 1.5 months after the accident.
On examination a round small tumor on dorsal side of the MPJ of right index finger. She told us, she had received operation for giant cell tumor of the same finger several years ago. At that time this tumor had not been removed and left. Active and passive extension of the MPJ of right index finger was -25°. Diagnosis of locking of the MPJ of right index finger and GCT of tendon sheath was made and operation was carried out. The tumor was excised. On exploration of the joint a 0.6×0.4cm oval, yellowish-brown tumor sprung out, an another smaller tumor was found in the joint. After these tumors were excised the joint was unlocked by partial resection of cartilage of medial edge of the second metacarpal head. The post operative course was uneventful. The pathologic diagnosis of the tree tumors was GCT of tendon sheath.
