A Case of Pigmented Villonodular Synovitis in Eighty-Four Year Old Man

Abstract

Pigmented villonodular synovitis is unusual disease and the etiology is unknown. Jaffe and Lichtenstein concluded that the lesion is an inflammatory response to some unknown agent and that the disease is not a true tumor or neoplasm. In the previous literatures, the disease is manifested that the most common age of incidence is young adult life with a range from the second to the fifth decades.
Recently we experienced a case of this disease in eighty four year old man, In our case the microscopic findings was demonstrated chronic inflammation of the synovial membrane and no tumorous condition.