畸胎瘤占小儿实体瘤的 6 7% ,位于腹膜后的巨大畸胎瘤临床少见 ,我院遇到 2例 ,报告如下 :例 1,女 ,10岁。出生后即发现腹部饱胀。体检 :上腹偏右触及一约 2 0ｃｍ× 15ｃｍ大小不规则肿物 ,表面光滑 ,质地中 ,可推动 ,局部轻压痛。ＣＴ扫描 :右中上腹膜后见一囊实性病灶 ,其 Teratoma accounting for 67% of pediatric solid tumors, located in the retroperitoneal huge teratoma clinical rare, our hospital encountered two cases, the report is as follows: Case 1, female, 10 years old. Abdominal fullness is found after birth. Physical examination: the right upper abdomen touches the right about an irregular tumor of about 2 0cm × 15cm size, the surface is smooth, texture, can promote local tenderness. CT scan: Right middle and retroperitoneal see a solid cystic lesions, its