骨软骨瘤是最常见的骨良性肿瘤,多发于青少年,大部分在儿童期发病,到骨骼成熟后即停止生长。常见发病部位是股骨下端及胫骨上端(约占50％),其次为肱骨上端,手骨、骨盆、肩胛骨、脊椎,偶发于骨骺。骨软骨瘤有单发(约占90％)和多发之分,男性发病率略高于女性。为积累国人体质调查资料, Osteochondromas are the most common benign bone tumors, occurring predominantly in adolescents. Most of them develop in childhood and stop growing when the bones mature. The most common sites are the lower femur and the upper end of the humerus (about 50%), followed by the upper humerus, hand bone, pelvis, scapula, and spine, occasionally in the epiphysis. Osteochondroma has a single (about 90%) and multiple points, with a slightly higher incidence of male than female. In order to accumulate the national body survey data,