发生于骨骼上的错构瘤罕见，我们收集一例，经手术病理证实，现报告如下。患者女，4岁，跛行，左小腿中段局限性隆起2年半。2年半前，发现患儿跛行、在小腿局部隆起，胫骨成角畸形，局部骨皮曾在某院就诊，诊断为先天性胫骨假关节。日后见跛行逐渐加重，左小腿中段明显隆起，故 Hamartomas that occur on bones are rare. We have collected one case and confirmed by pathology. The report is as follows. The patient was female, 4 years old, with a claudication and a two-and-a-half-year limitation of the middle leg of the left lower leg. Two and a half years ago, the children were found to have lameness, local bulging in the calf, and angulation of the sacrum. The partial osseous skin was seen in a hospital and was diagnosed as congenital sacral pseudoarthrosis. In the future, Minhang will gradually increase and the middle leg of the left calf will rise significantly.