畸胎瘤是小儿最常见的实体瘤之一,可发生于任何年龄,但小儿尤以新生儿和婴幼儿期最多见,以骶尾部最多见,家长往往因发现患儿腹部膨隆或骶尾部肿块而来院就诊,B超报道较多。笔者在临床工作中遇到1例腹膜后畸胎瘤误诊,现报道如下。1病例介绍患儿男,6个月,因“呕吐2d”于2005年9月 Teratoma is one of the most common solid tumors in children can occur at any age, but especially in infants and newborns, especially in infants and young children, the most common to the sacrococcygeal, parents often found in children with bulging or sacral bulging abdomen The hospital, B-more reports. I encountered in the clinical work of a case of retroperitoneal teratoma misdiagnosis, are reported below. 1 cases of children with children, 6 months, due to “vomiting 2d” in September 2005