Question: what is pvns of the hip?
Answer: Pigmented villonodular synovitis (PVNS) is a rare disease that can affect any joint, bursa or tendon sheath. It is characterised by a villous or nodular hyperplasia of the synovium. It was first described in 1852 by Chassaignac,1 but it is to Jaffe that we owe the name of villonodular synovitis (1941). 2.