title: Primary intraosseous squamous cell carcinoma of the maxilla possibly arising from an infected residual cyst: A case report.
abstract: Primary intraosseous squamous cell carcinoma (PIOSCC) is a rare type of odontogenic carcinoma arising from the jawbone. Odontogenic cysts are true cysts that arise from the dental epithelium, which is associated with tooth formation. The epithelial lining of odontogenic cysts has the potential to transform into various types of odontogenic tumor; however, this transformation from an odontogenic cyst to a malignant tumor is rare. The definitive diagnosis for PIOSCC generally requires the observation of either features of squamous cell carcinoma (SCC) within the jawbone that are distinct from direct invasion from the surface oral epithelium, or evidence of SCC arising from odontogenic epithelium and from tumors that have metastasized to the jawbone from distant sites. In the present study, a case of PIOSCC of the maxilla is presented, which, based on the results of computed tomography and the clinical course, was hypothesized to have originated from an infected residual cyst.
authors.affiliation: Division of Oral and Maxillofacial Surgery, Kagawa Prefectural Central Hospital, Takamatsu, Kagawa 760-8557, Japan.
authors.forename: Shintaro
authors.initials: S
authors.lastname: Sukegawa
authors.affiliation: Department of Oral Diagnosis and Dentomaxillofacial Radiology, Okayama University Hospital, Okayama 700-8558, Japan.
authors.forename: Hidenobu
authors.initials: H
authors.lastname: Matsuzaki
authors.affiliation: Department of Molecular and Developmental Biology, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Katase
authors.affiliation: Division of Oral and Maxillofacial Surgery, Kagawa Prefectural Central Hospital, Takamatsu, Kagawa 760-8557, Japan ; Department of Oral and Maxillofacial Surgery, Shimane University Faculty of Medicine, Izumo, Shimane 693-8501, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Kanno
authors.affiliation: Division of Oral and Maxillofacial Surgery, Kagawa Prefectural Central Hospital, Takamatsu, Kagawa 760-8557, Japan.
authors.forename: Toshiko
authors.initials: T
authors.lastname: Mandai
authors.affiliation: Division of Oral and Maxillofacial Surgery, Kagawa Prefectural Central Hospital, Takamatsu, Kagawa 760-8557, Japan.
authors.forename: Yuka
authors.initials: Y
authors.lastname: Takahashi
authors.affiliation: Department of Oral Diagnosis and Dentomaxillofacial Radiology, Okayama University Hospital, Okayama 700-8558, Japan.
authors.forename: Jun-Ichi
authors.initials: JI
authors.lastname: Asaumi
authors.affiliation: Division of Oral and Maxillofacial Surgery, Kagawa Prefectural Central Hospital, Takamatsu, Kagawa 760-8557, Japan.
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Furuki
keywords: computed tomography; primary intraosseous squamous cell carcinoma; residual cyst