Pigmented villonodular synovitis (PVNS) is a condition that causes the synovium—the layer of tissue that lines the joints and tendons—to thicken and overgrow. The mass that results from this overgrowth is not cancerous and does not spread to other areas of the body.
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Introduction: Malignant pigmented villonodular synovitis (PVNS) or Malignant giant cell tumour tendon sheath (MGCTTS) is a controversial and debatable lesion. 1These aggressive cases are designated malignant giant cell tumour tendon sheath or malignant PVNS. We report a case of 65 year old lady who was diagnosed eight years back as pigmented villonodular synovitis. She had multiple local recurrences and now presented with lymphnodal metastases, which is extremely rare. Case Report: Sixty five year old lady presented with swelling in left inguinal region of six months duration. She gave a past history of swelling around medial condyle of left femur eight years back.