1. Dahlin DC. Bone tumors: general aspects and data on 6221 cases. 3rd ed. Springfield: Charles C Thomas;1978. p. 329–343.
2. Bergh P, Kindblom LG, Gunterberg B, Remotti F, Ryd W, Meis-Kindblom JM. Prognostic factors in chordoma of the sacrum and mobile spine: a study of 39 patients. Cancer. 2000; 88:2122–2134.
3. Wang CC, James AE Jr. Chordoma: brief review of the literature and report of a case with widespread metastases. Cancer. 1968; 22:162–167.
4. McPherson CM, Suki D, McCutcheon IE, Gokaslan ZL, Rhines LD, Mendel E. Metastatic disease from spinal chordoma: a 10-year experience. J Neurosurg Spine. 2006; 5:277–280.
5. Zulch KJ. Brain tumors. Their biology and pathology. 3rd ed. Berlin Heidelberg: New York: Tokyo: Springer-Verlag;1986. p. 476–479.
6. Holzner H. [Unusual metastasis of chordoma]. Zentralbl Allg Pathol. 1954; 92:12–18.
7. Asano S, Kawahara N, Kirino T. Intradural spinal seeding of a clival chordoma. Acta Neurochir (Wien). 2003; 145:599–603. discussion 603
8. Krol G, Sze G, Arbit E, Marcove R, Sundaresan N. Intradural metastases of chordoma. AJNR Am J Neuroradiol. 1989; 10:193–195.
9. Stough DR, Hartzog JT, Fisher RG. Unusual intradural spinal metastasis of a cranial chordoma. Case report. J Neurosurg. 1971; 34:560–562.
10. Holton JL, Steel T, Luxsuwong M, Crockard HA, Revesz T. Skull base chordomas: correlation of tumour doubling time with age, mitosis and Ki67 proliferation index. Neuropathol Appl Neurobiol. 2000; 26:497–503.