Abstract
This study evaluates the comparison of the PD1 and PD-L1 protein signaling pathway in Actinic Cheilits (AQ), a lesion that can progress to Squamous Cell Carcinoma (SCLC). Material and methods: 30 cases of lower lip biopsies with diagnosis of AK and 30 of CCEL will be selected, obtained from the Oral Pathology Laboratory of the Institute of Science and Technology of São José dos Campos/UNE…