A 46-year-old woman referred for swelling on median part of the mandible. She had become aware of the lesion 2 years ago as a bean-size swelling on her lingual gingiva.
She had visited an otorhinologist and had got the enucleation.
Recurrence of the lesion had occurred after 1 year and it had enlarged to an egg-size within 9 months. Clinical examination disclosed a moderately firm swelling extending laterrally 4 from to 3 on both labial and lig lingual sides.
X-ray exam showed diffused absorption of the bone. Under histopathological diagnosis of emangiopericytoma, the tumor was excised with the mandible from 1 to IT rectangularly.
Histopathological exam of the excised specimen revealed invasion of tumor cells to the mandibular bone marrow, which suggests Malignant hemangiopericytoma.
40 Gy of total dose irradiation after operation.
At the 4 years' exam, there was no evidence of recurrence or metastasis.
