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Clinical importance of the location of lesions with regard to mesenteric or antimesenteric side of the small intestine

2007; Elsevier BV; Volume: 66; Issue: 3 Linguagem: Inglês

10.1016/j.gie.2007.02.036

1097-6779

Keijiro Sunada, Hironori Yamamoto, Yoshikazu Hayashi, Kentaro Sugano,

Gastrointestinal Bleeding Diagnosis and Treatment

The small intestine is a 5- to 6-m long hollow organ that consists of the duodenum, jejunum, and ileum. The jejunum and ileum have a broad, fan-shaped mesentery. Between the 2 sheets of peritoneum, which form the mesentery, are blood vessels, lymph vessels, and nerves running to the intestines, lymph nodes, and fatty tissue. There is no clear anatomical demarcation between the jejunum and ileum; the former, located in the left upper quadrant, comprises approximately two fifths of the length of the small intestine, whereas the latter, located in the right lower quadrant, comprises the approximate remaining three fifths.