The ease of sigmoidoscopy and the advent of video technology have provided the tools for endoscopists to assume a more active role in the evaluation and treatment of these disorders. Visual inspection of the perianal area coupled with digital examination should always precede endoscopic examination because subtle clues to underlying pathology may be identified. Retroflexion best permits evaluation of distal lesions, particularly those at or above the dentate line. A careful inspection of the anal canal should also be performed, especially for patients reporting anorectal pain and for patients with pain elicited on digital examination.
Distal rectum, RF, anterior view. The anorectal line white arrow , ATZ, dentate line black arrow , pecten PEC and the contour of the levator ani muscles are seen. Right R , left L and anterior A positions are labelled; b.
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It lies behind the bladder in males left , and the vagina and uterus in females right. The rectum is a part of the lower gastrointestinal tract. The rectum is a continuation of the sigmoid colon , and connects to the anus. The rectum follows the shape of the sacrum and ends in an expanded section called the rectal ampulla, where feces are stored before their release via the anal canal.