RESUMEN
Ossifying fibromyxoid tumor of soft parts is a rare soft tissue neoplasm of uncertain histogenesis. It occurs commonly as a subcutaneous or intramuscular mass in the extremities and trunk, but rarely in the head and neck region. Its biologic behavior is generally benign, but a locally aggressive clinical course due to a pseudocapsule containing nests of tumor cells. Herein we report a case of a benign ossifying fibromyxoid tumor which occurred in the right temple in 34-year-old woman. The tumor was located in the temporalis muscle and completely removed with clear margin through bicoronal approach. The lesion was 2.0 x 2.5 x 3.0cm sized white to tan colored, well demarcated, firm mass. The tumor was covered by a fibrous capsule, and there was incomplete shell of lamellar bone at the periphery of the nodule. The tumor cells were uniformly round, ovoid, or spindle-shaped in collagenous and myxoid stroma. During 1 year's postoperative follow-up, the patient had no local recurrence.