The CS-PDL1 algorithm is intended for cancer screening in lung tissue samples: - Detection of cells positive for the PDL1 antibody. - Assists in diagnosing pathological conditions related to the presence of the PDL1 antibody. - Provides specific information about a physiological or pathological state. - A quantitative automated algorithm that integrates Artificial Intelligence. - Uses lung tissue samples from patients of any gender and age. Therefore, the purpose of the algorithm is to provide the pathologist or healthcare professional using it with an automatic identification of findings, facilitating the interpretation of areas with cancer on an image of a processed lung tissue sample. This is achieved by highlighting potential areas of interest so that the pathologist can make a faster and safer diagnosis, less influenced by inter-observer variability since it is standardized. The diagnosis provided by the algorithm is not definitive: it must always be validated by the pathologist, who confirms the accuracy of the generated information.