Abstract：
Ewing Sarcoma belongs to the category of undifferentiated blue small round cell tumour and its origin has been traced to be that from inside of the bone, but can also arise in soft tissues (extraosseous form). These lesions belong to the category of round cell tumours, which includes a varied range of tumours. This category, although found in other extremities and thoracic regions, head and neck region have been reported to have less number of tumours, in addition to that the soft tissue counterparts are even scarcely reported. Thereby, this case reports represents a soft tissue counterpart of Ewings Sarcoma on the hard palate, which not only extends unilaterally but extends bilaterally.
摘要：
尤因肉瘤属于未分化的蓝色小圆细胞肿瘤，其起源被追溯到骨内部，但也可以出现在软组织（骨外形式）。这些病变属于圆形细胞肿瘤，其中包括不同范围的肿瘤。这个类别,虽然在其他四肢和胸部发现，据报道，头颈部肿瘤数量较少，除此之外，软组织对应物甚至几乎没有报道。因此，该病例报告代表硬腭上的Ewings肉瘤的软组织对应物，不仅单方面延伸，而且双边延伸。
