title: Cytoplasmic tubular structures in pigmented villonodular synovitis.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007181:Inclusion Bodies, Viral; D007717:Knee / Q000473:pathology; D009975:Orthomyxoviridae / Q000302:isolation & purification; D013583:Synovial Membrane / Q000382:microbiology*; D013585:Synovitis / Q000382:microbiology*