頰部に発生したosteolipomaの1例

• Published in: 日本口腔外科学会雑誌 Vol. 63; no. 1; pp. 30 - 34
• Main Authors: 赤澤, 登, 松井, 太輝, 重田, 崇至
• Format: Journal Article
• Language: Japanese
• Published: 社団法人 日本口腔外科学会 01.01.2017
• Subjects: 脂肪腫; 良性腫瘍; 頰部腫瘍; 骨脂肪腫
• ISSN: 0021-5163; 2186-1579
• DOI: 10.5794/jjoms.63.30

Lipomas are benign tumors arising frequently in the trunk and extremities. They are uncommon neoplasms of the oral cavity and account for only 1% to 5% of all neoplasms arising in the oral cavity. Osteolipoma, a subtype of lipoma, is particularly rare among such tumors. Osteolipoma was first described by Plaut et al. in 1958. We report a case of osteolipoma that arose in the buccal region. A 57-year-old man presented to our hospital because of swelling of the buccal region. On palpation of the left buccal mucosa, a hard tumor was felt. Both T1- and T2-weighted magnetic resonance imaging (MRI) showed high signal intensity in most of the tumor. Fat suppression T1-weighted images showed low signal intensity. T1-weighted MRI showed low and high signal intensity inside the tumor. MRI thus revealed the presence of non-adipose tissue in the tumor. A biopsy of the tumor showed that it was a subtype of lipoma, and the preoperative diagnosis was a subtype of lipoma. Surgical excision of the buccal tumor was performed with the patient under general anesthesia. The pathological diagnosis of the resected tumor confirmed that it was an osteolipoma. No signs of recurrence have been noted as of 30 months postoperatively.