Monarch Disease Ontology identifier MONDO_0024662 (colorectal tubulovillous adenoma) is a neoplasm that arises from the glandular epithelium of the colonic and rectal mucosa. It is characterized by tubular and villous architectural patterns. The neoplastic glandular cells have dysplastic features. Also known as: large bowel tubulovillous adenoma, tubulovillous adenoma of large bowel, tubulovillous adenoma of the large bowel.