title: Oropharyngeal hairy polyp with meningothelial elements.
abstract: The so-called hairy or teratoid polyp is a rare lesion of bigerminal origin that comprises elements derived from both ectodermal and mesodermal cell lines. In this article we report the presence of meningothelial elements in a hairy polyp, a previously undescribed component of this entity. The lesion was characterized by a pedunculated outgrowth from the hard palate. The surface of the outgrowth was covered by squamous epithelium and a central core of fibroadipose tissue, pilosebaceous glands, cleftlike pseudovascular spaces, and groups of epithelioid cells. These reticulated and cellular foci had the immunohistochemical and ultrastructural features of meningothelial tissue.
authors.affiliation: Department of Pathology, Mayo Graduate School of Medicine, Rochester, Minn., USA.
authors.forename: B A
authors.initials: BA
authors.lastname: Olivares-Pakzad
authors.forename: H D
authors.initials: HD
authors.lastname: Tazelaar
authors.forename: L P
authors.initials: LP
authors.lastname: Dehner
authors.forename: J L
authors.initials: JL
authors.lastname: Kasperbauer
authors.forename: U
authors.initials: U
authors.lastname: Bite
mesh_terms: D002971:Cleft Lip / Q000150:complications; D002972:Cleft Palate / Q000150:complications; D004848:Epithelium; D006801:Humans; D007231:Infant, Newborn; D007569:Jaw Abnormalities / Q000150:complications; D008297:Male; D008578:Meninges; D009056:Mouth Abnormalities / Q000150:complications*; D009959:Oropharyngeal Neoplasms / Q000150:complications / Q000151:congenital / Q000473:pathology*; D011127:Polyps / Q000150:complications / Q000151:congenital / Q000473:pathology*; D013724:Teratoma / Q000150:complications / Q000151:congenital* / Q000473:pathology; D014059:Tongue / Q000002:abnormalities