21. The correct answer is A. In the rectal area, there is sensory innervation below the dentate line, above that there is no sensory innervation. So pathology above that is likely to be painless, and pathology below that is going to be painful. External hemorrhoids are below the dentate line. Internal hemorrhoids at least originate above the dentate line. AVM in the sigmoid and rectal carcinoma would be above the dentate line.
No comments:
Post a Comment