title: Epithelial-myoepithelial carcinoma of the nasal cavity.
abstract: A 22-year-old male presented with a 1-year history of nasal obstruction due to a polypoid mass in the right nasal cavity. Histopathologic examination revealed the tumor to consist of a mixture of a trabecular structure with a double-layered arrangement of inner dark cells and outer clear cells. Immunohistochemical examination showed the clear cells to be positive for alpha-smooth muscle actin and S-100 protein. Ultrastructural examination confirmed the myoepithelial cell origin. The tumor was excised and no recurrence or metastasis was found 40 months after surgery. We describe here a rare case of epithelial-myoepithelial carcinoma arising from the nasal cavity, one of the most unusual locations.
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul. hmlee91@hotmail.com
authors.forename: H M
authors.initials: HM
authors.lastname: Lee
authors.forename: A R
authors.initials: AR
authors.lastname: Kim
authors.forename: S H
authors.initials: SH
authors.lastname: Lee
mesh_terms: D000199:Actins / Q000378:metabolism; D000328:Adult; D002277:Carcinoma / Q000175:diagnosis* / Q000378:metabolism / Q000601:surgery; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D009296:Nasal Cavity / Q000000981:diagnostic imaging / Q000473:pathology; D015508:Nasal Obstruction / Q000175:diagnosis / Q000209:etiology; D009669:Nose Neoplasms / Q000175:diagnosis* / Q000378:metabolism / Q000601:surgery; D017293:Protein S / Q000378:metabolism; D014057:Tomography, X-Ray Computed
chemical_list: D000199:Actins; D017293:Protein S