Periosteal chondroma.
D000293:Adolescent; D000328:Adult; D001859:Bone Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D002648:Child; D002812:Chondroma / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D002813:Chondrosarcoma / Q000175:diagnosis; D005260:Female; D005266:Femoral Neoplasms; D006801:Humans; D006811:Humerus; D007512:Ischium; D008297:Male; D008663:Metacarpus; D012516:Osteosarcoma / Q000175:diagnosis; D010521:Periosteum; D011859:Radiography