GIANT-CELL TUMOR OF TENDON SHEATH WITH INTRAOSSEOUS INVASION - A CASE-REPORT

Giant cell tumor of tendon sheath (GCTTS) is a common fibrohistiocytic tumor that frequently involves periarticular soft tissues and in cert ain cases may erode adjacent osseous surfaces. Although this clinicall y benign tumor may be quite locally aggressive, intraosseous extension is a most uncommon finding. We describe a classic GCTTS that, at the time of presentation, had the uncharacteristic x-ray film appearance o f a lytic osseous lesion.