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Volume 2006, Article ID 27212, 3 pages
Case Report

Synovial Sarcoma Mimicking Haemophilic Pseudotumour

1Department of Trauma & Orthopaedics, Royal Free Hampstead NHS Trust, London NW2 5QX, UK
2Department of Trauma & Orthopaedics, St Thomas' Hospital, London SE1 7EH, UK
3Department of Radiology, Royal Free Hampstead NHS Trust, London NW2 5QX, UK
4Haemophilia and Haemostasis Unit, Katherine Dormandy Centre, Royal Free Hampstead NHS Trust, London NW2 5QX, UK

Received 21 April 2005; Accepted 13 June 2006

Copyright © 2006 Haroon A. Mann et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This is a case of a 36-year-old gentleman with haemophilia A who was presented with an acute atraumatic soft tissue swelling in the right thigh. Open biopsy was performed with the resultant diagnosis of a synovial cell sarcoma. Although the clinical findings were nonspecific they could easily have been found in a bleeding haemophilic pseudotumour. The findings reported on MRI scan initially were highly consistent with those present in patients with mild haemophilia. An important part of orthopaedic management in haemophilia is concerned with intraarticular and intramuscular bleeding. Haematomas are common and sarcomas are rare. However the absence of trauma should alert the clinician to the possibility that the abnormality may represent haemorrhage into a tumour and not just haematoma, even in a haemophilic patient.