A minimum of n=3000 patients about equally distributed about the 16 most common tumor entities shall be recruited between year 1 and 2 after primary cancer diagnosis via the cancer registry Baden-Württemberg. Data on fatigue (EORTC QLQ-FA12, BFI), quality of life (EORTC QLQ-C30), depression and anxiety (PAQ-4), and information about screening and treatment of fatigue will be assessed via self-reported questionnaires. Clinical data regarding tumor and treatment characteristics will be derived from the cancer registry.