Symptoms of depression, anxiety, and stress is common among both cancer patients and cancer survivors and can lead to prolonged hospitalization, reduced quality of life, and deteriorate prognosis. In Mindfulness-Based Cognitive Therapy (MBCT) participants practice attention towards the present moment and acceptance of feelings and physical discomfort. This is in particular relevant for cancer patients and -survivors who often experience psychological symptoms connected to negative thoughts about the past and worries about the future.