At the Istituto Nazionale Tumori, from 1970 to 1974, 154 patients with cancer of the large bowel underwent urography; 80 cases before surgery and 74 after surgery. Preoperative findings, correlated with neoplasia, were found in 4 patients, while non-neoplastic lesions were found in 32 patients. During postoperative evaluation, 21 patients showed lesions by locoregional diffusion of the neoplasia with involvement of the ureters especially by metastatic nodes. Less frequent was the finding of bladder involvement. 30 patients presented lesions due to surgery. Urography is useful for evaluating patients with neoplasia of the large bowel, especially after surgery and during follow-up.
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