A multicenter, national pharmacological observational study that has as its overall goal to implement a set of validated and agreed upon European-wide questionnaires (PROMs - patient's reported outcomes) to assess patients' perceptions of aspects of their lives based on the treatment they are receiving. Specifically, with the research we present here, we aim to obtain data on patients' health and condition, including quality of life, symptom status, physical function, mental health (anxiety and depression), sleep quality, and sexuality as useful indicators not only of patient well-being but also of the effectiveness of the treatment itself. The study involves the following: patients will be asked to complete online questionnaires at the following timepoints: before the start of treatment, after 4 and 8 treatment cycles, and at disease progression. Data will also be collected regarding the patient's oncological medical history, treatment performed, response to treatment at CT/PET reevaluations, any toxicities that arose during treatment.