Diffuse outgrowth arising from the SYNOVIAL MEMBRANE; SYNOVIAL BURSA; or TENDON sheath around the joint cavity, with extension to surrounding soft tissue. It is characterized by pigmented HEMOSIDERIN-containing MACROPHAGES; FOAM CELLS; and multinucleated GIANT CELLS. It usually occurs in the hands and feet, and around large joints, such as in the ankle and knee joints.
Also Known As:
Synovitis, Pigmented Villonodular; Diffuse Tenosynovial Giant Cell Tumor; Pigmented Villonodular Synovitides; Synovitides, Pigmented Villonodular; Villonodular Synovitides, Pigmented; Villonodular Synovitis, Pigmented