title: A granular cell tumor of the buccal mucosa--a case report.
abstract: In the oral region, granular cell tumors often occur in the tongue, but rarely in the buccal mucosa. A case of granular cell tumor in the right buccal mucosa of a 74 year-old female is described. An elastic-hard solid mass about 1 cm in diameter was palpated under the right buccal mucosa. It was well-defined from the proximal tissues and adhered to part of the buccal mucosa. As a result of a biopsy, the diagnosis of a granular cell tumor was made. The tumor was resected together with the surrounding tissues under local anesthesia. Histopathological examination revealed large tumor cells with eosinophilic, PAS-positive fine granules under the hyperplastic epithelium. The granular cells stained negatively with PTAH, but positively with S-100 protein. Electron microscopic observations revealed a number of lysosomes of various sizes and densities within the cytoplasm of the tumor cells.
authors.affiliation: Department of Oral Surgery, Kurume University School of Medicine, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Seki
authors.forename: T
authors.initials: T
authors.lastname: Kameyama
authors.forename: T
authors.initials: T
authors.lastname: Kihara
authors.forename: M
authors.initials: M
authors.lastname: Yoshida
authors.forename: S
authors.initials: S
authors.lastname: Hashimura
authors.forename: T
authors.initials: T
authors.lastname: Fujimasa
authors.forename: T
authors.initials: T
authors.lastname: Okina
mesh_terms: D000368:Aged; D005260:Female; D016586:Granular Cell Tumor / Q000473:pathology* / Q000648:ultrastructure; D006801:Humans; D009061:Mouth Mucosa / Q000473:pathology; D009062:Mouth Neoplasms / Q000473:pathology* / Q000648:ultrastructure