CDKN2A and neoplasm: Chi-Square/Fisher exact test revealed no further correlations of cHPPVC or p16INK4a-overexpression with any of the assessed pathological, patients' or treatment characteristics like age, date of primary diagnosis, nodal status, extracapsular tumor spread, grading, lymphovascular space invasion, radiation dose or setting of radiotherapy (adjuvant vs. definitive vs. neoadjuvant) (see also Tables 2, 3).