Anal & Transanal Surgical Techniques

It is axiomatic that a happy rectum and a happy mind (and body) go hand in hand. So, how do colorectal surgeons remove abnormal tissue from the 20 cm long rectum while not disturbing its happy functioning? By using transanal surgical techniques, the surgeon may be able to avoid having to perform a complex abdominal proctectomy, thus sparing the rectum.