LOCAL RECURRENCE OF PAROTID FIBROSARCOMA: A CASE REPORT AND THE REVIEW OF THE LITTERATURE

Berkaoui Mohamed*, Darfaoui Mouna, Elomrani Abdelhamid and Khouchani Mouna

ABSTRACT

Primary sarcomas of the salivary glands occur rarely with few cases having been reported. Fibrosarcoma is a rare type of primary sarcoma with a poor prognosis and low life expectancy. Microscopically, these tumors resemble their counterparts encountered in other areas. They can be easily confused with spindle cell (sarcomatoid) carcinomas, myoepithelial carcinomas or malignant melanomas. We present an unusual case of a primary fibrosarcoma that arose in the left parotid gland of a 44 years male, who presented a swelling in the left parotid compartment. Computed tomography (CT) scan revealed a tumor arising from the left parotid gland. A near total parotidectomy was performed and the histopathology report a poorly differentiated malignant tumor proliferation of very probable carcinomatous origin infiltrating the parotid parenchyma brought back with peri-nervous sheath without vascular emboli or lymph node metastases (14N- / 14). On immunohistochemistry, the tumor was positive for vimentin and was negative for pancytokeratin and S-100, which lead to a firm diagnosis of fibrosarcoma.

Keywords: Fibrosarcoma, Parotid gland, salivary gland, sarcoma.