Metastatic Lesions to the Large Intestine

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Abstract
A review of surgical specimens or operative notes and autopsy material will indicate that metastatic lesions affecting the colon are not uncommon. When the roentgenological features of numbers of such cases are studied, special patterns evolve which may be quite impressive. Familiarity with the changes that are produced by cancer metastases, either in direct contact with the wall of the large intestine or implanted in the mesentery, permits the roentgenologist to offer this opinion as one of highest probability among several that may be considered. The routes by which metastases reach the colon include: the embolic, either lymphatic or vascular; direct extension, with invasion of the contiguous colon wall; seeding or implantation of malignant cells. This last may occur because of free cells in the peritoneal fluid or because of manipulation of the primary lesion at the time of surgery. It is felt that metastatic implants in the mesentery may produce some functional changes even if the intestinal wall is n...

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