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【例１】患儿，男，１０岁。以右小腿后方中部肿块３年为主诉于１９９６年８月收住入院。患者于３年前发现右小腿桃核样大小包块，轻微疼痛，行走时加重。逐年长大，要求手术治疗。查体一般情况可，右小腿腓肠肌部位可扪及－５ｃｍ×６ｃｍ大小质硬肿块，活动度差。化验检查无
[Example 1] Children, male, 10 years old. The main mass in the posterior middle of the right calf for 3 years was admitted to hospital in August 1996. The patient had found a right-sided nuclei-like mass 3 years ago, with slight pain and increased on walking. Grows year by year and requires surgery. The general condition of the examination is that the right calf gastrocnemius muscle area can be paralyzed with a hard mass of -5cm x 6cm in size, and the activity is poor. Laboratory inspections