目的探讨多中心性骨肉瘤的影 像学特征及诊断。方法 回顾性分析自 2012年至今我院诊治的6例多中心性骨肉 瘤X线、CT及MRI表现。结果 本组6例均发 生于骨骼系统，按Amstutz分型Ⅰ型5例， Ⅱ型1例。结论 多中心性骨肉瘤多见于青 少年，影像以多发硬化性病灶为特点，X 线、CT、MRI是影像诊断的重要手段。

Objective To explore the imaging features of multifocal osteosarcoma. Methods The imaging data of 6 cases of multicentric osteosarcoma in our hospital since 2012 have been retrospectively analyzed. Results The 6 cases all occurred on skeletal system and divided into type I (n=5) and type II (n=1) according to the Amstutz classification. Conculusion Most multifocal osteosarcoma patients were adolescents. The typical imaging feature was with multiple sclerosis lesions. X ray, CT, MR were important methods for imaging diagnosis.