A Fetus with Imperforate Anus Developing Pulmonary Hypoplasia Triggered by Transient Urethral Obstruction

Figure 1

Fetal ultrasonography and the change of fetal bowel. Fetal images. (a) The distal rectal pouch shows dilated bowel with intraluminal calcifications (arrowheads) at 20 weeks. R indicates distal rectal pouch. The arrowheads indicate bowel calcifications. (b) The echogenic center (dotted circle) is not detectable at 20 weeks, which indicates that anal mucosa is invisible. (c) Fetal bowel dilation at 26 weeks. (d) Fetal bowel dilation at 31 weeks. (e) Fetal bowel dilation at 32 weeks. (f) Thoracic compression by bowel dilation at 31 weeks. The arrowheads indicate the diaphragm.

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