Pigmented villonodular synovitis (SVNP) is a benign proliferative disorder, locally aggressive of the synovium, characterized by haemosiderin deposits, and affects the knee most often and young adults patients. Between 1985 and 2007, 9 patients with SVNP were treated in our service, 8 diffusse forms and one localized, and most frequent location was the knee (7 cases). Anterior open synovectomy was the treatment in all cases, combined with Y 90 synoviorthesis in one of cases. One case of recurrence was detected, involving the knee, and second open synovectomy was required. One patient required a total knee arthroplasty within 3 years after the synovectomy. Its high rate of recurrence is the main problem due to difficulty to complete synovectomy of the affected tissue.

Pigmented villonodular synovitis (SVNP) is a benign proliferative disorder, locally aggressive of the synovium, characterized by haemosiderin deposits, and affects the knee most often and young adults patients. Between 1985 and 2007, 9 patients with SVNP were treated in our service, 8 diffusse forms and one localized, and most frequent location was the knee (7 cases). Anterior open synovectomy was the treatment in all cases, combined with Y 90 synoviorthesis in one of cases. One case of recurrence was detected, involving the knee, and second open synovectomy was required. One patient required a total knee arthroplasty within 3 years after the synovectomy. Its high rate of recurrence is the main problem due to difficulty to complete synovectomy of the affected tissue.