Chordoma.
D000328:Adult; D000368:Aged; D002817:Chordoma / Q000175:diagnosis / Q000196:embryology / Q000453:epidemiology / Q000401:mortality / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery; D003037:Cobalt Radioisotopes; D005260:Female; D006801:Humans; D008297:Male; D009362:Neoplasm Metastasis; D009777:Occipital Bone; D011867:Radioisotope Teletherapy; D012445:Sacrococcygeal Region
D003037:Cobalt Radioisotopes