It concerns a study in which we wish to collect images and corresponding histological information (microscopic characteristics) in a prospective manner in various European and non-European centers (multicentric). This means that the collection of images is new and happens in the context of a procedure that has not yet been carried out. The relevant procedure will involve a standard colonoscopy during which we wish to collect digital images and videos of large colorectal polyps (colorectal lesions). These images will later be used for the development of a new computer software (artificial intelligence) that is able to predict the histology (microscopic characteristics) and extent of invasion in the intestinal wall (submucosal invasion) all by itself. The latter is one of the goals in the European project ECOPOP in which the sponsor is involved.