title: Internal sphincter and haemorrhoids: a pathological study.
abstract: Histological examination of the lower margin of the internal sphincter has demonstrated an increased amount of fibrous tissue in patients with haemorrhoids compared with controls. This finding may be of relevance to the treatment of haemorrhoids by maximal anal dilatation.
mesh_terms: D001003:Anal Canal / Q000473:pathology*; D005260:Female; D006484:Hemorrhoids / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000473:pathology*