抄録
Two cases of benign chondroblastoma around the knee are reported. The patients, both teenagers, complained of knee pain and joint stiffness. On plain X-ray and computed tomographic film, the tumors formed an oval defect and calcification surrounded by a sclerotic rim in the involved bone. On T1-weighted MR images, the tumors were hypo-iso intense. The T2-weighted images showed spotty hyperintensity, which was enhanced with Gd-GTPA. The tumors were surgically treated with bone grafting after curettage. The risk of recurrence is 11-24%; therefore sufficient curettage is necessory while avoiding injuries of epiphysial catilage.
