舌下腺に発生した囊胞腺癌の1例

• Published in: 日本口腔外科学会雑誌 Vol. 64; no. 1; pp. 24 - 28
• Main Authors: 八橋, 明子, 藤, 大補, 古森, 孝英, 長谷川, 淳子, 石田, 佳毅
• Format: Journal Article
• Language: Japanese
• Published: 社団法人 日本口腔外科学会 01.01.2018
• Subjects: 囊胞腺癌; 舌下腺
• ISSN: 0021-5163; 2186-1579
• DOI: 10.5794/jjoms.64.24

Cystadenocarcinoma is a rare malignant tumor that accounts for less than 0.2% of all salivary gland tumors. Most cases of cystadenocarcinoma occur in the region of the parotid gland, followed by the minor salivary glands. We report a case of cystadenocarcinoma arising in the region of the sublingual gland. Case patient: a 78-year-old man. Chief complaint: a painless mass located in the left side of the mouth floor. Present illness: a 40 × 20 mm, unmovable, hard elastic mass bulging from the left side of the mouth floor. Findings on magnetic resonance imaging: a relatively well-defined, multilocular mass with significantly high signal intensity was seen on T2-weighted images. The normal left sublingual gland was not detected in the images. Clinical course: An incisional biopsy revealed adenocarcinoma. Based on the clinical diagnosis of a malignant sublingual gland tumor, we performed partial resection of the floor of the mouth and modified radical neck dissection on the left side. Pathologically, cystadenocarcinoma was definitively diagnosed. There has been no sign of recurrence or metastasis as of 9 years after surgery.