Extraskeletal osteogenic sarcomas and chondrosarcomas in children.
D001859:Bone Neoplasms; D002648:Child; D002813:Chondrosarcoma; D006801:Humans; D009369:Neoplasms; D012516:Osteosarcoma; D012509:Sarcoma
CHONDROSARCOMA; SARCOMA, OSTEOGENIC