孕妇，31岁，第1胎停经7月余，因在外院疑胎儿畸形而来我院复诊。B超检查：双顶径8．Zcm，股骨长5．scm，胎心率140次价，律整。自胎儿骼尾部向外突出一大小约19．4cmX13．IcmX19．scm的混合性包块，边界清晰，以实性为主，其内见多个大小不等的不规则液性暗区。此包块与胎儿紧 Pregnant women, 31 years old, the first child after menopause in July more than suspected due to the fetus in our hospital from the hospital referral. B-ultrasound: biparietal diameter 8. Zcm, femur length 5. scm, fetal heart rate 140 times the price, law and order. From fetal tail protruding a size of about 19.4cmX13. IcmX19. scm mixed mass, clear boundaries, in order to solid, which see a number of irregular liquid of different sizes dark. This mass is tight with the fetus