[Granulocytic sarcoma. A case with an unusual location]

An unusual case of granulocytic sarcoma infiltrating the parotid gland of a 17-year-old woman is reported. There was no evidence of acute myeloid leukemia or chronic myeloproliferative disease at time of diagnosis. The myeloid nature of the tumor was discovered with the aid of immunochemistry. The patient responded well to combined polychemotherapy and local radiotherapy. Eighteen months after diagnosis, the bone-marrow biopsy showed no signs of blast infiltration. Granulocytic sarcoma should be considered in the differential diagnosis of malignant tumors of the parotid gland, although it is rare.