1.病例介绍 患儿王铁成,男,10个月。其父母偶然发现其下腹部有一鹅卵大小肿块,自发病来患儿低热,排稀便,食欲欠佳,偶有排尿困难。体检:下腹部脐下偏右可触及一7.0×6.0cm大小包块,边界较清楚,表面光滑无压痛,活动尚可,移动性浊音阴性。B超提示:下腹部实性包块(畸胎瘤不除外)。CT所见:盆腔中线部位见约6.0×5.0cm大小卵圆形的软组织密度为主的 1. Case presentation Wang Tiecheng, male, 10 months. His parents had accidentally discovered that there was a goose-size mass in his lower abdomen. From the onset of illness, the children had low fever, sparse stools, poor appetite, and occasional difficulty in urinating. Physical examination: The right abdomen below the umbilicus can touch a 7.0 × 6.0cm mass, the boundary is clear, the surface is smooth and no tenderness, activities are acceptable, mobile dullness is negative. B ultrasound tips: abdominal mass (except teratoma). CT findings: The pelvic midline site is about 6.0 × 5.0cm oval-shaped soft tissue density-based