title: Hypertrophic myopathy of the internal anal sphincter: a rarely recognized cause of proctalgia.
authors.affiliation: Service of Digestive Diseases, Hospital Universitario Vall d'Hebron, Universidad Autónoma de Barcelona, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Martorell
authors.forename: F
authors.initials: F
authors.lastname: Azpiroz
authors.forename: J R
authors.initials: JR
authors.lastname: Malagelada
mesh_terms: D001003:Anal Canal / Q000000981:diagnostic imaging / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery; D001004:Anus Diseases / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D019160:Endosonography; D006801:Humans; D006984:Hypertrophy; D008365:Manometry; D010146:Pain / Q000209:etiology