An algorithm to distinguish between distant metastases and metachronous lung primary in patients with HPV-related oropharyngeal cancer

Distinguishing between distant metastases of HPV-related oropharyngeal squamous cell carcinoma (OPSCC) and metachronous primary lung squamous cell carcinoma (SCC) is important as it has implications for treatment, prognosis counselling, and registry data. Although p16 immunohistochemistry (p16 IHC) is widely accepted...