Abstract
Intramuscular lipoma is an uncommon tumor in the oral cavity. We report a rare case of intramuscular lipoma in the inferior surface of the tongue. A 60-year-old woman was referred to our department because of a painless swelling of the inferior surface of the tongue. Clinical examination revealed an elastic soft mass arising in the inferior surface of the tongue. The overlying mucosa was normal in color. T1- and T2- weighted images clearly showed high signal intensity, with a maximal diameter of 25 mm. The lesion was excised under general anesthesia. Histopathological examination showed proliferation of mature adipose cells, including bundles of skeletal muscle fibers. There were no atypical cells. On the basis of the results of histopathological examination, we diagnosed an intramuscular lipoma arising in the inferior surface of the tongue. No signs of recurrence have occurred as of 1 year 10 months after surgery.
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