A case of recurrent malignant trichilemmoma in the oral floor with special reference to electron microscopic findings of the tumor.

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We reported a rare case of malignant trichilemmoma in hair follicle tumors.<BR>The patient was a 48-year-old man. He noticed the painless tumor in his neck in 1987. He was referred to his surgeon and the tumors were surgically removed. Histopathological diagnosis was malignant trichilemmoma.<BR>But after 6 months, the patient visited our department concerning a tumor in the oral floor. After radiotherapy and chemotherapy were undertaken, we performed excision and radical neck disection. The excised tumor was characterized in electron microscopy by the presence of clear cells in the PAS stain and presence of glycogen-rich cells. As the result, histological diagnosis was recurrent malignant trichilemmoma in the oral floor.
社団法人日本口腔外科学会の論文