顎下部に発生した多形腺腫由来癌の1例

• Published in: 日本口腔外科学会雑誌 Vol. 55; no. 8; pp. 424 - 427
• Main Authors: 堀, 信介, 山田, 理浩, 西田, 光男, 安田, 真也, 木下, 浩二, 東郷, 由弥子
• Format: Journal Article
• Language: Japanese
• Published: 社団法人 日本口腔外科学会 20.08.2009
• Subjects: 多形腺腫; 多形腺腫由来癌; 未分化癌
• ISSN: 0021-5163; 2186-1579
• DOI: 10.5794/jjoms.55.424

This report describes a case of carcinoma ex pleomorphic adenoma originating from a recurrent pleomorphicadenoma in a 67-year-old woman. She was referred to our department because of a swelling in the rightcervical region. At presentation, a painless elastic hard tumor measuring 40 X 30mm was located in the right sideof the upper neck. Computed tomography and magnetic resonance imaging showed enhancement of a nodule and a segmentedmass. The biopsy diagnosis was a carcinoma ex pleomorphic adenoma. A radical neck dissection, including the tumor, was performed. Histological examination revealed a rare undifferentiatedcarcinoma. The final diagnosis was a carcinoma ex pleomorphic adenoma because the patient had previouslyundergone a resection of a ipsilateral submandibular pleomorphic adenoma showing atypia and intracapsularinvasion. There has been no sign of recurrence or metastasis for 4 years 8 months postoperatively.