副顎下腺由来と考えられた多形腺腫の１例

• Published in: 日本口腔外科学会雑誌 Vol. 71; no. 3; pp. 147 - 152
• Main Authors: 高岡, 昇平, 菅野, 直美, 山縣, 憲司, 内田, 文彦, 福澤, 智, 武川, 寛樹
• Format: Journal Article
• Language: Japanese
• Published: 公益社団法人 日本口腔外科学会 20.03.2025
• Subjects: 副顎下腺; 唾液腺腫瘍; 多形腺腫
• ISSN: 0021-5163; 2186-1579
• DOI: 10.5794/jjoms.71.147

This paper describes a rare case of pleomorphic adenoma originating from an accessory submandibular gland. A 28-year-old woman presented to our hospital with a mass in the left submandibular area. Imaging revealed an irregularly-shaped mass, approximately 20 mm in size, in contact with the anterior surface of the left submandibular gland. A thin layer of fat was observed between the submandibular gland and the mass, with no evident continuity, suggesting an extramandibular gland tumor. Additionally, the submandibular lymph node was enlarged, exhibiting a signal pattern similar to that of a tumor. The diagnosis was benign tumor; however, due to the possibility of malignancy, tumor excision and a neck lymphadenectomy of the Level IB region were performed. Pathohistological examination confirmed the presence of a pleomorphic adenoma, and tissue similar to that of a normal submandibular gland was present in the outer capsule of the pleomorphic adenoma. No recurrence has been observed in the nine years following surgery.