七、先天性膈疝先天性膈疝（congenitaldiaphragmatichernia）是由于胚胎期膈肌发育缺陷，出现较大的裂隙或缺损，致生后一部分腹腔脏器疝入胸腔，压迫胸腔内组织，引起呼吸、循环障碍，或胃肠道梗阻、绞窄、出血甚至坏死。
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