感慨舞蹈天使每天写日志的热情，同时也向小荷老师汇报我最近还干了些什么，把我最近听的一些讲座陆续贴上来，主要是理论或者我查看的文献根据自己的体会来写的，由于条件所限，我没有这样的切片可看，想以此抛砖引玉，如果大家有好的病理切片，希望能贴上来拜读，^_^，谢谢。

 

 

Extraosseous Ewing sarcomas (EESs) are rare malignant neoplasms of the soft tissue that do not arise from bone and have histological characteristics similar to osseous ESs and peripheral primitive neuroectodermal tumors.  Extraosseous ESs are usually found in the lower extremities and paravertebral regions in patients in their 20s and 30s. Most primary EESs extend into the anterior epidural space through foraminal widening and bone destruction; involvement of only the cervical epidural space is highly unusual, although EESs with both intradural and extradural settling have been reported.

Due to its similarity to other lesions, establishing the diagnosis of EES is difficult but should nonetheless be considered in the differential diagnosis of spinal epidural tumors. Because all lesion types cannot be identified on the basis of imaging studies alone, a histopathological examination must be conducted to establish a definitive diagnosis.  Early, aggressive resection combined with chemo- and radiotherapy can produce good results in patients with EES.