Fig. 3.

a The patient was placed in the jackknife position, with the buttocks parted by adhesive strapping. b This is the image of the tumor resection, showing an opening of the rectum (arrow). c The rectal wall was closed using the Gambee’s method with suturing of the muscle layer. d The tumor, lifted via digital rectal examination, was extracted with a safety margin. e This is the schema of Fig. 3b