Pigmented Villonodular Synovitis (PVNS) is a rare condition that causes painful swelling in certain joints. It can cause large, noncancerous tumors to form at these joints. Estimates show that around ...
PVNS is part of a group of noncancerous tumors that affect the joints called tenosynovial giant cell tumors (TGCTs). It causes excessive growth of the joint lining that leads to pain, stiffness, and ...