Non-small cell lung cancer diagnosis aid with histopathological images using Explainable Deep Learning techniques

•Lung cancer is the most lethal and the second with the highest number of new cases.•A tissue biopsy analysis may be delayed due to the pathologists’ workload saturation.•Convolutional Neural Networks are commonly used to develop automatic classifiers.•The final proposed system improves on the results and reliability of previous work.•Explainable Deep Learning techniques help the pathologist to understand the results.