Pfm. Choong et al., PIGMENTED VILLONODULAR SYNOVITIS - MONOCLONALITY AND METASTASIS - A CASE FOR NEOPLASTIC ORIGIN, Acta orthopaedica Scandinavica, 66(1), 1995, pp. 64-68
We report a 48-year follow-up of a case of recurrent pigmented villono
dular synovitis of the knee. Subcutaneous metastasis to the contralate
ral thigh was an unusual finding. Histology demonstrated fibroblastic
and histiocytic proliferation, as well as increased mitotic activity i
n recurrent lesions. Cytogenetic analyses demonstrated monoclonality a
nd chromosomal abnormalities. Our findings support a neoplastic origin
of this lesion.