lt;bgt;Problem analysis:lt;/bgt;Hello, it was generally believed that the distance between rectal cancer tumors and the anus is 7 centimeters, but now most of the knowledge is that it is 5 centimeters
lt; bgt; Comments and suggestions: lt; /bgt; Hello, if the rectal cancer tumor is 5 cm away from the anus, it may be possible to preserve the anus. As long as sufficient tumor margins are ensured and the anal sphincter ring is preserved, the anus can generally be preserved
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