Inclusion Criteria:

- Patients of either sex older than 18 years

- Rectal tumor identified as rectal adenoma by multifocal biopsy using colonoscopy,
with endorectal ultrasound and magnetic resonance imaging findings of non-invasive
tumor.

- Size of the tumor between 2 and 6 cm in maximum diameter.

- Tumor location, lower edge at least 2 cm from the anal verge, and upper edge at least
15 cm from the anal verge.

- ASA score more than III.

- intervention was performed under general anesthesia

Exclusion Criteria:

- Invasive adenocarcinoma shown in the final pathology study. "in situ" or
intraepithelial adenocarcinomas are not excluded .

- Pregnant patients

- Patients with liver cirrhosis or blood dyscrasia.

- Patients who can not be administered under general anesthesia.

- Patients on antiplatelet or anticoagulation therapy who have not been properly
prepared for surgery.

- Presence of two or more transanal endoscopic excisions in the same procedure.

- Informed consent not signed.