EC Clinical and Medical Case Reports

Hemangiosynovial sarcoma is a rare vascular tumor that often presents in the joint synovium. This case report details a 13-year-old girl who presented with persistent knee pain, leading to the discovery of a mass on MRI, which was later diagnosed as hemangiosynovial sarcoma. The tumor, one of the largest reported in the literature, was evaluated with imaging techniques and treated successfully. A comparison with existing literature is provided, including a discussion of the incidence rate, diagnostic methods, and treatment options.

 Keywords: Hemangiosynovial Tumor; Magnetic Resonance Imaging (MRI); Pigmented Villonodular Synovitis (PVNS)

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