Pigmented villonodular synovitis: how to make an early diagnosis

ABSTRACT

Pigmented villonodular synovitis [PVNS] is a rare condition usually affecting the knee. It is a benign proliferative growth of the synovium of obscure etiology with a wide spectrum of clinical presentations. PVNS can be a dificult condition to manage, with an average delay in diagnosis of 4.4 years. We describe a case of diffuse form of PVNS in a young patient who presented with vague left knee complaints for two years