1997 年 46 巻 4 号 p. 1225-1226
The etiology of spontaneous osteonecrosis of the knee is still unknown. Severa authors have reported that medial meniscal tears are related to osteonecrosis. We report a case in which osteonecrosis occurred after sustaining a medial meniscal tear. A factor in the etiology of this disease is the stress concentration over the edge of the meniscal fragment.