3. Prior or concurrent presence of another neoplastic disease that is different in terms of tumour site and histology of the colorectal cancer in the 5 years prior to the inclusion of the patient in the study, except in situ cervical cancer, superficial bladder carcinoma [Ta (non-invasive), Tis (carcinoma in situ) and T1 (tumour invades lamina propria)] and non-melanoma skin tumours.