临床上常引起横结肠梗阻图13-8（A）十二指肠空肠连接部的反向旋转（横过SMA腹侧），但结肠旋转正常；（B）十二指肠旁疝【伴发畸形】中肠不旋转或旋转不全往往是先天性膈疝和腹壁缺损——脐膨出及腹裂的重要并发症。
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