肛乳头是起源于齿线附近直肠柱基底的结构。肛乳头最常见的部位是截石位3、7、1 1点,其他常见部位是l、5、9点,通常较小、不引起症状,被认为是正常的解剖。肥大的肛乳头是指由齿线或皮肤和肛管上皮交界处脱出的皮赘,它们能转变为纤维性息肉。肥大肛乳头和纤维性肛门息肉经常伴 The anal nipple is a structure that originates from the base of the rectal column near the tooth line. The most common site of anal papilla is 3,7,1 1 lithotomy position, the other common site is l, 5,9 points, usually smaller, does not cause symptoms, is considered to be normal anatomy. Hypertrophic anal nipple refers to the skin line or the skin and anal epithelial junction prolapse skin, they can transform into fibrous polyps. Fat anal papillae and fibrous anal polyps often accompany