Evidence for a human oncogenic virus.
D001859:Bone Neoplasms; D005350:Fibroma / Q000209:etiology*; D006801:Humans; D007719:Knee Joint; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000209:etiology*; D009858:Oncogenic Viruses; D012190:Retroviridae / Q000302:isolation & purification*; D013899:Thoracic Neoplasms; D014776:Virus Cultivation