问：膝关节滑膜骨软骨瘤病为何随部位而有不同的Ｘ线表现？其影像的病理基础如何解释？答：膝关节滑膜骨软骨瘤病（下称本症）在髌上囊者多呈互相融合的桑椹状（晚期），其中可见多个中心密度低周围密度高的环状影像，前者多为稀疏的初级松质骨和软骨，后者相当干软骨内成... Q: Why knee synovial osteochondromatosis with different parts of the X-ray performance? How to explain the pathological basis of its image? A: The knee synovial osteochondromatosis (hereinafter referred to as the disease) in the suprapatellar sac were mostly merged with each other mulberry (late), which can be seen in a number of low center density of low density around the ring, the former mostly Sparse primary cancellous bone and cartilage, which is quite dry cartilage ...