Manyama Mange, Malyango Avelin, Raoof Ameed, Mligiliche Nurru L, Msuya Charles, Nassir Nasnass, Mtui Estomih
Medical Education Division, Weill Cornell Medicine-Qatar, Qatar Foundation, P.O. Box 24144, Doha, Qatar.
Department of Anatomy, Kilimanjaro Christian Medical University College, P.O. Box 2240, Moshi, Tanzania.
Surg Radiol Anat. 2019 Nov;41(11):1383-1386. doi: 10.1007/s00276-019-02245-4. Epub 2019 Apr 29.
Anatomic variations involving arterial supply of the large intestines are of clinical significance. Variations range from the pattern of origin, branching and territorial supply. The colon, the part of the large intestine, usually receives its arterial blood supply from branches of the superior and inferior mesenteric arteries. However, anatomic variation in this vascular arrangement has been reported, with vascular anatomy of the right colon being described as complex and more variable compared with the left colon. During routine cadaveric dissection of the supracolic and infracolic viscera, we encountered an additional mesenteric artery originating directly from the anterior surface of the abdominal aorta between the origins of the superior and inferior mesenteric arteries. This additional "inferior mesenteric artery" ran obliquely superiorly toward the left colon giving rise to two branches supplying the distal part of the ascending colon, the transverse colon and the proximal part of the descending colon. Awareness and knowledge of this anatomic variation are important for radiologists and surgeons to improve the quality of surgery and avoid both intra- and postoperative complications during surgical procedures of the colon.
涉及大肠动脉供应的解剖变异具有临床意义。变异范围包括起源模式、分支和供血区域。结肠作为大肠的一部分，通常由肠系膜上动脉和肠系膜下动脉的分支供应动脉血。然而，已有报道称这种血管排列存在解剖变异，与左半结肠相比，右半结肠的血管解剖更为复杂且变异更多。在对结肠上和结肠下内脏进行常规尸体解剖时，我们遇到一条额外的肠系膜动脉，它直接起源于腹主动脉前表面，位于肠系膜上动脉和肠系膜下动脉起源之间。这条额外的“肠系膜下动脉”斜向上朝向左半结肠走行，发出两个分支，供应升结肠远端、横结肠和降结肠近端。认识和了解这种解剖变异对于放射科医生和外科医生提高手术质量以及避免结肠手术过程中的术中及术后并发症很重要。
