A Case of Fibrous Histiocytoma in Parotid Gland

Fibrous histiocytoma is a tumor of a biphasic cell population of fibroblasts and histiocytes. it usually occurs in the sun-exposedskin and orbital tissue but it has also been found in the upper aerodigestive tract, salivary gland, and deep layers of scalps andface. Fibrous histiocytoma in the parotid gland is extremely rare. it must be distinguished from other spindle cell tumors of parotid gland, Particularly those of epithelial and myoepithelial origins, in mmiunohistochemical studies, antibody markers againstvimentin and smooth muscle-specific actin lead to the diagnosis of fibrous histiocytoma. The malignant fibrous histiocytoma canbe differentiated by its histopathology, since it consists of pleomorphism of cells, abundant mitotic figure, atypic mitotic figure andother tissue invasion. The clinical features such as rapid growth and distant organ metastasis allow a diagnosis of malignant variants.Treatment of benign fibrous histiocytoma can be made by a wide local excision without the sacrifice of near organs.