Osteosarcoma arising in a solitary osteochondroma.
D000328:Adult; D001859:Bone Neoplasms / Q000150:complications / Q000209:etiology; D002812:Chondroma / Q000150:complications* / Q000473:pathology; D005260:Female; D006801:Humans; D007717:Knee; D012516:Osteosarcoma / Q000209:etiology* / Q000473:pathology