Two Cases of Intraosseous Ganglion of Carpal Bones

Abstract

Intraosseous ganglion (IOG) of carpal bones is rare. We report two cases of IOG of the lunate and scaphoid.
Case 1 was a 40-year-old female having motion pain of the right wrist for 6 months. There was tenderness at the dorsal aspect of the lunate. Active flexion was limited to 45° due to pain. The right grip strength was decreased to 11kg (left; 30kg). X-rays of the lunate showed a well-defined transparent area outlined by the rim of sclerosis. Tomography and CT scan demonstrated dosal cortical defect of the lunate. Cyst and stalk penetrating the palmar cortex of the lunate showed high signal intensity on the T2-weighted image of MRI. Intraoperative findings revealed stalk communicating with the lunotriquetral joint. Curettage and bone graft were performed. Histologic findings were identical with IOG. No recurrence was found after 9 months.
Case 2 was a 28-year-old female having right wrist pain for one year. X-rays of the wrist showed a well-defined, transparent area outlined by the rim of sclerosis on the proximal part of the scaphoid. Intraoperative findings revealed IOG communicating with the scaphocapitate joint. Curettage and bone graft were performed. No recurrence was found after 5 years.