CZ:Ref:DOI:10.1023/A:1008947301735

McMaster ML, Goldstein AM, Bromley CM, Ishibe N, Parry DM (2001). "Chordoma: incidence and survival patterns in the United States, 1973-1995.". Cancer Causes Control 12 (1): 1-11. DOI:10.1023/A:1008947301735. PMID 11227920. Research Blogging. ^[e]

Reports on a long-term study involving 400 patients with microscopically confirmed chordoma, revealing an overall yearly incidence rate of about 1 per million in the United States and a median survival time of about 6 years after diagnosis. It also shows that cranial, spinal and sacral locations each represent about one third of the total number of cases, and that males are affected about twice as often as females.