A case of large pleomorphic lipoma expanding from the neck to the submandibular region

Abstract

Although pleomorphic lipoma may contain a small number of atypical cells and resembles an atypical lipomatous tumor histologically, it is a tumor characterized by a clinically benign course. Pleomorphic lipoma typically arises in the posterior cervical region, shoulders, and back, with relatively few reported cases of the tumor in the oralmaxillofacial region. We report on a 60-year-old man with a pleomorphic lipoma that developed from the neck to the submandibular region and was left untreated for more than 40 years because the patient was asymptomatic. The tumor was removed together with its fibrous capsule. Twenty months after surgery, the patient remains recurrence-free and has a good clinical course. Among 39 reports of this tumor in Japan that we searched this time, only one case similat to ours was reported, but reports of pleomorphic lipoma arising in the cervical region are rare in Japan. : pleomorphic lipoma (多形性脂肪腫) ，floret cell (花冠状細胞) ，submandibular region (顎下部) 1) 名古屋掖済会病院歯科口腔外科 (主任：足立守安部長) 2) 愛知学院大学歯学部顎口腔外科学講座 (主任：栗田賢一教授) 3) 静岡県立総合病院歯科口腔外科 (主任：林 尚徳主任医長) 1)