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我院自1958～1990年共收治颌骨骨肉瘤ZI例，现报告如下。临床资料1．性别与年龄：本组21例，男10例，女11例；年龄18～65岁，平均34．2岁，以20～40岁居多；病程3～6个月，平均4个月。2．病灶部位：上颌骨6例，其中跨部3例，齿槽突区2例，上颌窦侵蚀颅底鼻咽部1例；下颌骨15例?
Our hospital since 1958 ~ 1990 were admitted to ZI cases of jaw osteosarcoma, are as follows. Clinical data 1. Sex and age: The group of 21 cases, 10 males and 11 females; aged 18 to 65 years, mean 34.2 years old, mostly in 20 to 40 years; duration of 3 to 6 months, an average of 4 months. 2. Lesions: 6 cases of maxillary, including 3 cases of cross-section, 2 cases of cogging, maxillary sinus erosion of skull base in 1 case of nasopharyngeal; mandibular 15 cases?