In the present investigation, it is planned to carry out a prospective, multicenter study, randomized and blinded to the statistician. Patients with a recent diagnosis of CM and who are scheduled to have their first consultation in which their options will be discussed of treatment to participate in the study. To those who agree to participate and sign the informed consent, the protocol coordinator of each center will randomly assign them to the intervention group or the standard group (in a 1:1 ratio) before the appointment medical. The intervention group will receive customizable support material while the Standard group will receive a non-customizable material (Annex 2). Additionally, you will be instructed to the intervention group that the support material received can be filled with the information discussed with the medical team. The protocol coordinator will obtain sociodemographic data and clinicopathology of the medical records of the participants. After the next visit follow-up, the coordinator will apply to both groups questionnaires about the knowledge of the patient about his own disease, satisfaction with the support material received and perceived ability to participate in discussions about their treatment, and the comprehension of written materials (CHLT-6). After one month, both groups will respond knowledge questionnaires to assess long-term information retention, disease uncertainty (SF-MUIS) and satisfaction with medical information provided (EORTC-QLQ-INFO25).
