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Diffuse-type giant cell tumours (GCT), also known as pigmented villonodular synovitis, are characterised by synovial hypertrophy that affects one or several joints, bursas or tendon sheaths, especially in young adults.1 GCT are generally treated by surgical synovectomy.1 ,2 However, the recurrence rate is high, with figures of up to 55%.3 Adjuvant therapies exist, such as external beam radiotherapy (EBM) or intra-articular injection of radiopharmaceuticals (eg, yttrium-90).4–6 Nevertheless, outcomes remain suboptimal and new management options are required. We describe herein the use of bevacizumab, a humanised monoclonal antivascular endothelial growth factor (VEGF) antibody, as an alternative therapy in a case of severe and refractory diffuse-type GCT.
A 24-year-old man without prior past medical history consulted for painful knee swelling. Arthroscopy with biopsy was performed and the diagnosis of GCT …