title: Ultrastructure of pigmented villonodular synovitis.
mesh_terms: D004912:Erythrocytes / Q000648:ultrastructure; D006801:Humans; D006965:Hyperplasia / Q000473:pathology; D006984:Hypertrophy / Q000473:pathology; D007719:Knee Joint / Q000098:blood supply / Q000473:pathology; D008264:Macrophages / Q000648:ultrastructure; D008297:Male; D008875:Middle Aged; D010587:Phagocytosis; D013583:Synovial Membrane / Q000648:ultrastructure*; D013585:Synovitis / Q000473:pathology*; D013586:Synovitis, Pigmented Villonodular / Q000473:pathology*