Ancient schwannoma in oral cavity: a report of two cases

• Published in: Journal of the Korean Association of Oral and Maxillofacial Surgeons pp. 530 - 534
• Main Authors: 김나래, 정동해, Dae-Song Park, Dong-Woo Kim, 이상칠, Sung-Yong Kim, Ho-Yong Lim, Hak-Yeol Yeom, 김현민
• Format: Journal Article
• Language: English
• Published: 대한구강악안면외과학회 01.12.2011
• Subjects: 치의학
• ISSN: 2234-7550; 2234-5930

This paper reports two cases of schwannomas arising from the oral cavity. One is an intraoral ancient schwannoma located at the left cheek, which evolved over a period of 13 years. The tumor was a well-demarcated buccal mass, which was located in the left lower first premolar area, with an obliterated the buccal vestibule, leaving the overlying mucosa intact. The second case was a central intraosseous schwannoma located from the left lower 1st molar periapical area to the left 3rd molar periapical area. Pathologically, the first mass was composed of the spindle shaped tumor cells with wavy nuclei beneath the fibroconnective tissue of the gingiva but second case mass was not. Occasional nuclear pleomorphism was observed but mitosis or necrosis was absent. There were Antoni A and B areas along with strong, diffuse staining with the S-100 protein. Ancient schwannomas were diagnosed. Schwannoma is a slow-growing benign tumor, and an ancient schwannoma that shows cellular atypism is a variant of a schwannoma caused by purely degenerative changes. To date, only limited cases of ancient schwannomas in the oral cavity have been reported. KCI Citation Count: 1