INFERIOR MESENTERIC ARTERIAL PATTERNS; AN ANGIOGRAPHIC STUDY.

The importance of lesions of the segment of the gut supplied by the inferior mesenteric artery is hardly reflected by the volume of literature concerning this vascular bed. Over 75 per cent of all polyps and cancers of the colon occur in the area of distribution of this artery. Recent fragmentary studies suggest the possibility of identifying some of these lesions by arteriographie technics, and of differentiating them from inflammatory masses which simulate neoplasms (27). In the study of infarction of the bowel, emphasis traditionally has been on the superior mesenteric artery (29), which is a more common site of mesenteric thrombosis. Nevertheless, it is abundantly clear that the inferior mesenteric artery is also a frequent site of atheromatous change, and at times of occlusion. Perhaps a major factor in the persisting viability of the gut associated with significant disease of the inferior mesenteric artery is the richness of the collateral system. The inferior mesenteric artery itself serves as a co...

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