Results: in ten cases of three categories of congenital malformation fetus, the morphological and histological structures of appendix in syndactylia fetus, omphalo-thoracopagus twins and in anencephaly fetus show no obvious abnormity. 结果:3类10例先天性畸形胎儿中,并缺指畸形胎儿、胸腹联体胎儿及无脑儿阑尾的形态学及组织学结构均无明显异常。