https://www.selleckchem.com/pr....oducts/trc051384.htm
Immunohistochemistry for p16 was negative in all papillomas. 85% were positive for low-risk human papillomavirus (HPV) subtypes and all were negative for high-risk HPV subtypes. A well-differentiated, invasive squamous cell carcinoma was associated with two of the cases. Papillomas with squamous and respiratory features similar to the sinonasal exophytic Schneiderian papilloma can arise in the oro- and nasopharynx and like their sinonasal counterparts show an association with HPV. While many in this series were benign, they can be har