Rose J S, Hermann G, Mendelson D S, Ambinder E P
Skeletal Radiol. 1983;9(4):234-7. doi: 10.1007/BF00354123.
Extraosseous Ewing sarcoma--a rare clinical entity--is described and the radiographic and histologic features discussed. Histologically this type of tumor may be differentiated from other soft tissue malignancies, but the ultrastructural glycogen content of the cytoplasm makes it frequently inseparable from the conventional osseous form of Ewing sarcoma. In spite of the presence of a huge paraosseal mass with bone erosion or periosteal new bone, computed tomography was the only preoperative modality able to provide evidence of non-involvement of the marrow cavity. However, histologic documentation is necessary to prove that one is dealing with a totally extraosseous Ewing sarcoma.
骨外尤文肉瘤——一种罕见的临床实体——已被描述，并对其影像学和组织学特征进行了讨论。从组织学上看，这种类型的肿瘤可与其他软组织恶性肿瘤相鉴别，但细胞质的超微结构糖原含量使其常常难以与传统的骨尤文肉瘤区分开来。尽管存在巨大的骨旁肿块伴骨质侵蚀或骨膜新生骨，但计算机断层扫描是唯一能够在术前提供骨髓腔未受累证据的检查方法。然而，必须有组织学证据才能证明所处理的是完全骨外的尤文肉瘤。
