| [ Summary ] |
The definition of villous tumors (VT) remains somewhat vague. However, since no VTs, in the narrow sense of the term, were found in the subjects studied, tubulovillous adenomas (TVA) and traditional serrated adenomas (TSA), which are known to resemble VT in macroscopic appearance and histological morphology, were compared. Both TVA and TSA occur frequently in sites ranging from the rectum to the sigmoid colon and often present as mucus-rich, villous or having the pinecone appearance of sessile tumors, or polyps and are thus plesiomorphic. Study findings suggested that both TVA and TSA may grow and progress from TSA to VT by way of tubulovillous adenomas with serrations. |