孕妇,20岁,孕32周。超声检查示:宫腔内胎儿结构呈一巨大团状杂乱回声,形态欠规则;胎儿脊柱纵切面明显弯曲,后突呈弓形(图1);未见明显颅骨环回声;颅脑大体结构显示不清,仅见眼眶样结构,似蛙头状,颜面部显示不清;颈部见稍低团状回声与胎盘相连,分界不清;胸腹部无明显界限,膈肌显 Pregnant women, 20 years old, 32 weeks pregnant. Ultrasonography showed: intrauterine fetal structure showed a large group messy echo, the shape of the rules; fetal spinal column longitudinal section was significantly curved, after the sudden bow (Figure 1); no significant skull ring echo; the general structure of the brain showed no Clear, orbital-like structure, like a frog head, facial features unclear; see the lower neck echogenic link with the placenta, unclear boundaries; no obvious boundary between the chest and abdomen, diaphragmatic significant