Non-Wilms' intravascular masses in childhood.
D002648:Child; D006801:Humans; D008297:Male; D012082:Renal Veins; D013724:Teratoma / Q000473:pathology / Q000556:secondary*; D013736:Testicular Neoplasms / Q000473:pathology; D014682:Vena Cava, Inferior