title: Congenital midline sinus of the upper lip. Report of a case.
abstract: An extremely rare case of congenital midline sinus of the upper lip in a 12-year-old girl is presented. The sinus had a pit-like orifice in the midline philtral area with a duct extending 4 mm posterosuperiorly. It was excised by extraoral elliptical incision. Histopathological examination disclosed that the duct was covered by a stratified squamous epithelium with sebaceous glands. Twelve cases of this rare disease have previously been reported.
authors.affiliation: First Department of Oral Surgery, Tohoku University School of Dentistry, Sendai, Japan.
authors.forename: F
authors.initials: F
authors.lastname: Katou
authors.forename: K
authors.initials: K
authors.lastname: Motegi
mesh_terms: D002648:Child; D005260:Female; D005402:Fistula / Q000151:congenital* / Q000473:pathology / Q000601:surgery; D006801:Humans; D008047:Lip Diseases / Q000151:congenital* / Q000473:pathology / Q000601:surgery