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The Korean Journal of Cytopathology 1999;10(2): 191-195.
Fine Needle Aspiration Cytology of Pigmented Villonodular Synovitis: A Case Report .
Joon Hyuk Choi, Young Kyung Bae, Young Ran Shim, Mi Jin Kim, Won Hee Choi
Department of Pathology, Yeungnam University College of Medicine, Taegu, Korea.
ABSTRACT
Pigmented villonodular synovitis is a destructive, fibrohistiocytic proliferation producing innumerable villous and nodular synovial protrusions. Its common locations are knee, ankle, foot, and hip. Although histologic feature of this tumor is well known, there have been few reports on the fine needle aspiration cytology findings. We report the cytologic features of a biopsy-proven case of pigmented villonodular synovitis. The patient was a 21-year-old male with a mass of the right knee for 2 years. On fine needle aspiration cytology, the aspirates was composed of abundant mononuclear histiocytic cells, singly and in clusters, multinucleated giant cells, and hemosiderin pigments.
Key Words: Pigmented villonodular synovitis; Fine needle aspiration cytology; Knee joint