title: Maxillary odontogenic keratocyst with respiratory epithelium: a case report.
abstract: We report a case of odontogenic keratocyst with a respiratory epithelial lining and a malformed impacted tooth in the maxilla of a 39-year-old Japanese female who suffered from swelling symptoms for half a year. CT examinations revealed an air-filled cystic lesion with an impacted tooth crown in the maxillary bone which expanded to the nasal cavity as well as to the maxillary sinus. Histopathologically, the surgically removed cyst wall consisted of fibrous granulation tissue with a lining of parakeratinized squamous epithelium as well as ciliated pseudostratified epithelium and with retention of desquamated keratin materials in the lumen. The impacted tooth was malformed lacking a root portion. We discuss the frequency of respiratory epithelium in odontogenic keratocysts.
authors.affiliation: Division of Oral Pathology, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
authors.forename: Manabu
authors.initials: M
authors.lastname: Yamazaki
authors.forename: Jun
authors.initials: J
authors.lastname: Cheng
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Nomura
authors.forename: Chikara
authors.initials: C
authors.lastname: Saito
authors.forename: Takafumi
authors.initials: T
authors.lastname: Hayashi
authors.forename: Takashi
authors.initials: T
authors.lastname: Saku
mesh_terms: D000328:Adult; D005260:Female; D006097:Granulation Tissue / Q000473:pathology; D006801:Humans; D007633:Keratins / Q000032:analysis; D008439:Maxillary Diseases / Q000473:pathology*; D009807:Odontogenic Cysts / Q000473:pathology*; D020545:Respiratory Mucosa / Q000473:pathology*; D019228:Tooth Crown / Q000002:abnormalities; D014095:Tooth, Impacted / Q000473:pathology
chemical_list: D007633:Keratins