ðə sˌiːdˌiːkˌeɪˈɛn tˈuː ˈeɪ pˈiː sˈɪkstiːn ænd sˌiːdˌiːkˌeɪˈɛn tˈuː bˈiː pˈiː fˈɪftiːn lˈoʊsaɪ ˌɔn kɹˈoʊməsˌoʊm nˈaɪn pˈiː twˈɛnti wˈʌn ɑːɹ fɹˈiːkwəntli dᵻlˈiːɾᵻd ɪn kɔːɹdˈoʊməz ɐnˈʌðɚ stˈʌdi fˈaʊnd sˌiːdˌiːkˌeɪˈɛn tˈuː ˈeɪ ɪmjˌuːnoːɹiːktˈɪvᵻɾi ɪn dʒˈʌst fˈoːɹ pɚsˈɛnt ʌv kˈeɪsᵻz.
The CDKN2A (p16) and CDKN2B (p15) loci on chromosome 9p21 are frequently deleted in chordomas Another study found CDKN2A immunoreactivity in just 4% of cases.