Transanal total mesorectal excision in the prone jackknife position without being conscious of the size of prostatic enlargement for lower rectal cancer

经肛门全直肠系膜切除术，患者采用俯卧位（屈膝式），在不知晓前列腺增生大小的情况下，对低位直肠癌患者进行手术。