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The middle mesenteric artery.

R B Lawdahl1, F S Keller

  • 1Department of Radiology, University of Alabama at Birmingham School of Medicine 35233.

Radiology
|November 1, 1987
PubMed
Summary
This summary is machine-generated.

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A rare third mesenteric artery originating from the aorta was discovered during angiography for recurrent massive hemochezia. This anatomical variation, supplying the splenic flexure, is exceptionally uncommon in colonic arterial supply descriptions.

Area of Science:

  • Vascular anatomy
  • Gastrointestinal radiology
  • Surgical anatomy

Background:

  • Recurrent massive hemochezia necessitates detailed etiological investigation, often involving advanced imaging.
  • Variations in the mesenteric arterial supply are known but typically involve branching patterns, not separate origins from the aorta.

Observation:

  • Angiography revealed an unusual third mesenteric artery in a 70-year-old male patient presenting with recurrent massive hemochezia.
  • This anomalous vessel originated directly from the aorta, situated between the superior mesenteric artery and inferior mesenteric artery.

Findings:

  • The identified third mesenteric artery supplied the splenic flexure region of the colon.
  • This represents an extremely rare variation of the colonic arterial supply, distinct from common patterns.

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Implications:

  • Recognition of such rare arterial variations is crucial for accurate diagnosis and management of gastrointestinal bleeding.
  • Understanding anomalous mesenteric vasculature can impact surgical planning and interventional radiology procedures in the abdominal region.