Another study conducted in Thailand reported that among 504 patients with HNSCC, there was a low prevalence of p16-positive (28%) and HPV-positive (14.5%) OPSCC as well as in non-OPSCC (excluding hypopharyngeal cancer) (4% p16-positive and 3% HPV-positive) [9]. Here, CDKN2A is linked to head and neck squamous cell carcinoma.