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The anatomical variations in the branching patterns of the SMA were examined in 30 cadavers fixed in 10% formalin. Morphometric measurements were then obtained twice by two researchers. In the proposed classification system, Type I, characterized by all normal branches\u2014inferior pancreatoduodenal artery, ileocolic artery, right colic artery, middle colic artery and intestinal arteries\u2014occurred in 53.33% of the specimens. Type II, characterized by absence of the inferior pancreatoduodenal artery, was present in 26.67%. Type III, characterized by absence of the right colic artery, was present in 3.33%. Type IV, characterized by a common trunk for the inferior pancreatoduodenal artery and middle colic arteries, was observed in 3.33%. Type V, characterized by an aberrant hepatic artery and absence of the inferior pancreatoduodenal artery, was observed in 13.33%. The origin of the SMA was at the Th12\/L1 level in 10% of cases, at L1 in 43.33%, at L1\/L2 in 36.67%, and at L2 in 10%. The SMA is characterized by high morphological variability, the variants being associated with distinct clinical aspects. The introduction of a new, structured, anatomical classification seems necessary for all clinicians.<\/jats:p>","DOI":"10.1002\/ca.23841","type":"journal-article","created":{"date-parts":[[2022,1,28]],"date-time":"2022-01-28T09:05:30Z","timestamp":1643360730000},"page":"501-511","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Classification of the superior mesenteric artery"],"prefix":"10.1002","volume":"35","author":[{"given":"Adrian","family":"Balcerzak","sequence":"first","affiliation":[{"name":"Department of Anatomical Dissection and Donation Medical University of Lodz Lodz Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1317-1047","authenticated-orcid":false,"given":"Richard Shane","family":"Tubbs","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery Tulane University School of Medicine New Orleans Louisiana USA"},{"name":"Department of Neurology Tulane University School of Medicine New Orleans Louisiana USA"},{"name":"Department of Surgery Tulane University School of Medicine New Orleans Louisiana USA"},{"name":"Department of Structural &amp; Cellular Biology Tulane University School of Medicine New Orleans Louisiana USA"},{"name":"Department of Neurosurgery and Ochsner Neuroscience Institute, Ochsner Health System New Orleans Louisiana USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anna","family":"Wa\u015bniewska\u2010W\u0142odarczyk","sequence":"additional","affiliation":[{"name":"Department of Normal and Clinical Anatomy Medical University of Lodz Lodz Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"El\u017cbieta","family":"Rapacka","sequence":"additional","affiliation":[{"name":"Department of Normal and Clinical Anatomy Medical University of Lodz Lodz Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6414-9504","authenticated-orcid":false,"given":"\u0141ukasz","family":"Olewnik","sequence":"additional","affiliation":[{"name":"Department of Anatomical Dissection and Donation Medical University of Lodz Lodz Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2022,3,7]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.2169\/internalmedicine.49.2790"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.5603\/FM.a2020.0115"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.7326\/0003-4819-26-6-873"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-2006-941443"},{"key":"e_1_2_7_6_1","first-page":"1323","article-title":"Hepato\u2010spleno\u2010mesenteric trunk, in association with an accessory left hepatic artery, and common trunk of right and left inferior phrenic arteries, independently arising from left gastric artery: Case report using MDCT angiography. 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