Synovitis, Pigmented Villonodular |
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| Pigmented Villonodular Synovitides; Pigmented Villonodular Synovitis; Synovitides, Pigmented Villonodular; Villonodular Synovitides, Pigmented; Villonodular Synovitis, Pigmented | |
| Outgrowths of synovial membrane composed of villi and fibrous nodules characterized histologically by hemosiderin- and lipid-containing macrophages and multinucleated giant cells. It usually occurs in the knee. | |