1. During fetal development, abnormal openings may occur in the pericecal, small bowel, transverse colon, or sigmoid mesentery, as well as the omentum, leading to mesenteric hernias.
   在胎儿发育阶段，这种异常的裂隙可能发生在盲肠旁、小肠、横结肠或乙状结肠和网膜，造成肠系膜疝。

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