Based on an improved understanding of how the extent of successful cytoreduction is influenced both by inherent tumor biological characteristics as well as the aggressiveness of the surgical approach this project aims to better define the value of cytoreduction and to use the knowledge gained to develop more individualized therapy and follow-up. This will be achieved through a translational biomedical research approach. Due to the research group's traditions clinical phenotyping, biomarker identification, and clinical trials will be the focus.