联体双胎中,一个小体附着在一个大体上,称为寄生胎。是一种少见的畸胎,发生率为1/5万～1/7万。怍者所见1例,现报告如下。病例摘要患儿,男,2个月,足月第4产,分娩时头先露,由于胎儿腹部有一肿物影响躯干娩出,生后窒息半小时缓解,羊水较多,一个胎盘。婴儿脐部有一鸡蛋大小透明物,有波动感,第5天自行破裂流 In a conjoined twins, a body attached to a body, called a parasitic tire. Is a rare teratoid, the incidence rate of 1/5 million ~ 1/7 million. I see a person, are as follows. Case summary Children, male, 2 months, full-term fourth birth, head first dew during childbirth, as a result of the fetus has a mass of the abdomen was delivered torso, postpartum asphyxia half an hour to ease, more amniotic fluid, a placenta. Baby umbilical size of a transparent egg, a sense of volatility, the first 5 days rupture flow