头颈部的尤文氏肉瘤是罕见的,占全部尤文氏肉瘤的2。3＄(Dahlin,1978),大多数发生在下颌骨,也有起源于颧骨及中、下鼻甲者.筛骨原发性尤文氏(ESig、)肉瘤以前尚无报导.此病例肿瘤来自筛骨并通过筛板蔓延到前颅窝,是首次报导,其特点为肿瘤发生的部位罕见,在诊断和治疗上遇到不少困难. 病人为14岁男孩;两个月前鼻梁及右侧内眈部出 Ewing’s sarcoma in the head and neck is rare, accounting for 2. 3$ for all Ewing’s sarcoma (Dahlin, 1978). Most of them occur in the mandible, but also in the sacrum and in the middle and lower nasal turbinates. Ewing’s sarcoma has not been previously reported. This case was reported from the ethmoid bone and spread to the anterior fossa through the ethmoid plate. It was the first report that it was characterized by a rare tumor site and was not diagnosed or treated. Less difficult. The patient was a 14-year-old boy; two months ago the bridge of the nose and the right internal malleolus