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Intestinal malrotation is a congenital anomaly of rotation of the midgut (embryologically, the gut undergoes a complex rotation outside the abdomen). As a result: * the small bowel is found predominantly on the right side of the abdomen * the cecum is displaced (from its usual position in the right lower quadrant) into the epigastrium - right hypochondrium * the ligament of Treitz is displaced inferiorly and rightward * fibrous bands (of Ladd) course over the vertical portion of the duodenum (DII), causing intestinal obstruction. * the small intestine has an unusually narrow base, and therefore the midgut is prone to volvulus (a twisting that can obstruct the mesenteric blood vessels and cause intestinal ischemia). ==Associated conditions== This can lead to a number of disease manifestations such as: * Acute midgut volvulus * Chronic midgut volvulus * Acute duodenal obstruction * Chronic duodenal obstruction * Internal herniation * Superior mesenteric artery syndrome 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「intestinal malrotation」の詳細全文を読む スポンサード リンク
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