Giant cell (reparative) granuloma of the orbit.

Clinically and histologically, there exists considerable controversy as to what constitutes a giant cell tumor. There is an increasing awareness that the term giant cell tumors should not be used indiscriminately in describing lesions of the mandible, maxilla, and facial bones which contain multinucleated giant cells. This paper reports a rare case of giant cell reparative granuloma of the orbit. The differentiation between giant cell reparative granuloma and the true giant cell tumor is discussed and a description of the visual symptomatology associated with these lesions of th sphenoid bone is presented. These tumors must be removed completely to prevent recurrence.