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Anatomical location

Figure 2: The distribution of colorectal cancers. 30% palpable PR, 70% within reach of the 60 cm flexible scope. Flexures favoured sites.

Most tumors of the colo-rectum are within 60 cm of the anus. It has been reported that 30% are palpable on digital rectal examination. The flexures of the bowel appear to be favoured sites; the main site is the recto-sigmoid junction.

Adrian P. Ireland