Tags: Disease.
Villous adenoma is a type of polyp that grows in the colon and other places in the gastrointestinal tract and sometimes in other parts of the body. These adenomas may become malignant (cancerous). Villous adenomas have been demonstrated to contain malignant portions in about one third of affected persons and invasive malignancy in another one third of removed specimens. Colonic resection may be required for large lesions.