Villous tumors of the colon and rectum: Double-contrast study of 47 cases

Abstract

The radiological features of 47 villous tumors of the large bowel found in 39 patients by the double-contrast barium enema were studied. An attempt was made to determine the radiological indicators of malignancy and two features proved to be suspicious: large tumor size and indentation of tumoral base. This retrospective study emphasizes the advantages of the double-contrast technique in the detection of colonic villous tumors.

Large Villous Adenoma in Rectum Mimicking Cerebral Hemispheres

“…Typically, villous adenomas produce a sessile filling defect with an irregular mucosal pattern that has been referred to as reticular, granular, lacy, or feathery. This appearance is due to the collection of barium in the interstices of the adenomas' frondlike excrescences [4][5][6][7]. In two of our patients' CT studies, a similar phenomenon was observed as the oral contrast medium became trapped in the villous interstices, producing an analogous corrugated appearance (Fig.…”

“…tend to bleed less than other adenomas and are often asymptomatic, larger lesions may obstruct the bowel or bleed, particularly in the context of malignant transformation. Clinically, excessive mucus secretion may lead to diarrhea and electrolyte losses, especially loss of potassium [1][2][3][4][5][6][7].…”

Villous Gastrointestinal Tumors: Multimodality Imaging with Histopathologic Correlation

“…At barium examinations, villous lesions have been described as broad based and having numerous polypoid protrusions into the lumen of the bowel, with insinuation of barium into the interstices or clefts between the protrusions (57). These lesions have also been reported as having a fine lacework pattern, an irregular cobblestone appearance, a finely nodular appearance, or a reticulated pattern (19,(57)(58)(59). When villous lesions are carpet neoplasms, they may be flat, superficially spreading lobulated lesions that are subtle filling defects at single-column enema examinations and appear finely nodular or reticulated at double-contrast examinations (19,58) (Fig 7).…”