Cardio-oncology is an emerging field. Most of the data available have been issued from either retrospective analysis, industry data or pharmacovigilance data. These data sources include a number of bias. CONFUCIUS is a single tertiary centre prospective registry including all patients who have been referred for cardio-oncology assessemnt. The objectives are to provide a comprehensive vue of cardoi-oncology, enable to detect early signals of cardiotoxicity and enhance ancillary projetcts aiming at specific populations (e.g., type of cancer) and/or drugs.