抄録
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.
