Design: A cross-sectional, mixed-method, multinational study (Belgium, Italy, Spain). Quantitative Phase: Online questionnaire, using adapted theoretical frameworks (Value Perception Model, NASSS-AI, TFA). Qualitative Phase: Will follow based on quantitative findings. Participants: Adults diagnosed with localized prostate cancer. Recruitment via hospitals, social media, and patient associations. Data Collected: Personal and health information, attitudes toward AI, willingness to share data. Ethics Approved by ethics committees in each participating country. Informed consent obtained digitally before participation. Data anonymized and GDPR-compliant.