PubMed · 8472639
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F Rother. 1993-04-16. [Colonoscopy using contrast media].. https://pubmed.ncbi.nlm.nih.gov/8472639/
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Endoscopy is not yet a practical procedure for examining the small intestine. A variety of radiological techniques are available for investigating suspected small intestinal disorders. Plain radiographs are the initial procedure in patients who present acutely, and barium studies are mostly used in the patients who present less acutely. Enteroclysis (small bowel enema) is proving to be an accurate barium technique. Computed tomography (CT) is useful in certain cases, particularly in established intestinal obstruction, while angiography and radionuclide studies can be extremely useful in suspected intestinal bleeding. Ultrasound has a limited role in the investigation of intestinal disorders.
PURPOSE: The study contained herein was undertaken to report an original case of retroperitoneal fibrosis that resembled a rectal tumor both symptomatically and radiologically. METHOD: Reported is a case of retrorectal fibrosis with a brief literature review of the topic. RESULT: Although many forms of retroperitoneal fibrosis have been reported, extension below the pelvic rim is very unusual. Compression of the rectum and right ureter, with constipation as a chief complaint, made this case presentation unusual. Although computerized tomographic findings and needle biopsies supported the diagnosis of retroperitoneal fibrosis, an exploratory laparotomy was necessary to rule out a malignancy and to release the ureter. CONCLUSION: A fibrotic mass involving the retrorectal region may mimic a rectal tumor. To reach a final diagnosis, an exploratory laparotomy may be necessary, despite sophisticated evaluation techniques, because it is difficult to differentiate whether the mass is malignant.