Rectal villous tubular adenoma with high-grade intraepithelial neoplasia is a precancerous lesion, not a confirmed cancer.
Intraepithelial neoplasia refers to the different degree of difference in cell morphology and histological structure from the normal tissues from which it originates, and it is more commonly used in the cervix, prostate, and mucosa of gastrointestinal tract, etc. High-grade intraepithelial neoplasia is equivalent to severe xenogerminosis and carcinoma in situ, which has a high probability of cancerous transformation, but it is not yet a cancer yet.
Rectal adenoma with intraepithelial neoplasia, regardless of the grade, usually can be removed completely or locally by endoscopy. After surgery, it is recommended to complete abdominal CT examination to clarify whether there are lymph node enlargement around the tumor.
The first colonoscopy is performed at 3 months after the operation, and then every 6 months, and the examination interval can be extended according to the results of each examination.
If patients are diagnosed with rectal villous tubular adenoma with high-grade intraepithelial neoplasia, it is recommended that they go to regular hospitals to receive treatment from specialists to avoid delays.