title: Nasolabial cyst: presentation of a clinical case with CT and MR images.
abstract: The nasolabial cyst is an uncommon non-odontogenic cyst that develops in the lower region of the nasal ala; its pathogenesis is uncertain. This lesion grows slowly and measures between 1.5 and 3 cm; it is characterized clinically by a floating tumefaction in the nasolabial sulcus, which elevates the upper lip. The diagnosis is based on the clinical findings and, if necessary, image exams. This paper reports a case of a white 48-year-old Brazilian female patient that presented a firm tumor in the left ala of the nose; the clinical features suggested a nasolabial cyst. CT scans revealed an expanding tumor with soft tissue density located in the left ala of the nose. It measured 1.2 cm in diameter and had a clear and well-defined outline; its homogeneous density was about 50 HU. MR images revealed a circular lesion located in soft tissue; T1 and T2 weighted signals were hyperintense, as were images after fat suppression. The diagnosis was a nasolabial cyst, which was confirmed by histopathology after surgery.
authors.affiliation: Faculdade de Odontologia de Piracicaba, UNICAMP, Brazil.
authors.forename: Raphael Navarro
authors.initials: RN
authors.lastname: Aquilino
authors.forename: Vitor José
authors.initials: VJ
authors.lastname: Bazzo
authors.forename: Reinaldo José Antônio
authors.initials: RJ
authors.lastname: Faria
authors.forename: Nayene Leocádia Manzutti
authors.initials: NL
authors.lastname: Eid
authors.forename: Frab Norberto
authors.initials: FN
authors.lastname: Bóscolo
mesh_terms: D003560:Cysts / Q000175:diagnosis* / Q000601:surgery; D005260:Female; D006801:Humans; D008047:Lip Diseases / Q000175:diagnosis* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009668:Nose Diseases / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome