We recognized 11 patients (9 males, 2 females) diagnosed as having Ostechondritis dissecans of the knee treated surgically from 4 months to 4 years and 2 months. Their ages ranged from 12 to 27 years old (average 16.6 years), and the sites of their lesion were medial femoral condyle 8 cases, lateral femoral condyle (patello-femoral joint) 2 cases, and patella lcase. Predisposing sports activities were recognized in 8 cases such as baseball soccer etc. We performed as surgical treatments, bone peg graft for 8 cases (included arthrosopic treatment for 5 cases), removal of loose bodies for 3 cases. We utilized MR imaging as one method of postoperative evaluation for bone peg grafted cases.
