Department of Radiology, University of California-San Diego Medical Center, San Diego, CA, USA.
J Med Imaging Radiat Oncol. 2022 Apr;66(3):385-390. doi: 10.1111/1754-9485.13347. Epub 2021 Nov 7.
In human foetus, the mesenteries that carry vascular and neural supply to the alimentary tube play an important role in its development and anatomical location within the abdominal cavity. The mesenteric attachments of the small bowel, transverse colon and sigmoid allow them to be intraperitoneally mobile structures. In contrast, the ascending and descending colon lose their mesenteries by fusion with the parietal peritoneum and become fixed in retroperitoneal position along the posterolateral walls of the abdomen. In about 2%-4% of individuals, this process is disrupted, causing a complete or partial retention of their congenital mesocolon. The ascending or descending colon will then remain intraperitoneally mobile, affecting the normal visceral anatomy and causing potential complications. This article reviews the spectrum of radiological manifestations and clinical consequences of these anomalies.
在人类胎儿中，为消化道提供血管和神经供应的肠系膜在其发育和腹腔内解剖位置中起着重要作用。小肠、横结肠和乙状结肠的肠系膜附着使它们成为腹膜内可移动的结构。相比之下，升结肠和降结肠通过与壁层腹膜融合而失去肠系膜，成为沿腹部后外侧壁固定的腹膜后位置。在大约 2%-4%的个体中，这个过程被打乱，导致其先天性结肠系膜的完全或部分保留。然后，升结肠或降结肠将保持腹膜内可移动，影响正常内脏解剖结构并导致潜在并发症。本文综述了这些异常的放射学表现和临床后果的范围。
