This is an observational, post-authorization, prospective follow-up, multi-centre, national study designed to describe the spectrum of health-related quality of life in patients with metastatic pancreatic cancer previously untreated with chemotherapy This study is designed to observe patients treated in routine clinical practice, without the exclusion limitations of a clinical trial. Patients will be enrolled in 7 Spanish sites. In all cases, the decision to treat patients will be performed prior to the decision to include the patient in the study.