Transrectal ultrasonography is a technique that is gaining popularity in the assessment of rectal and extrarectal disease. From April 1987 to May 1989, 53 transrectal sonograms were done to evaluate rectal disease. Twenty-seven of 30 adenocarcinomas have been correctly staged. The operative procedure and the decision to use preoperative radiotherapy have been influenced by the results of these studies. Recurrent tumors and less common anorectal disease have also been evaluated with this technique. When feasible to perform, ultrasonographically guided biopsies yield specimens that can provide added information on which to base a therapeutic approach.
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