Inclusion Criteria:  Patients who have undergone intended curative CRS+HIPEC for peritoneal metastases originated from colorectal cancer (HIPEC cohort) according to national Danish guidelines Patients who have undergone intended curative total or anterior pelvic exenteration (PE cohort) for advanced or recurrent colorectal cancer according to national Danish guidelines  Exclusion Criteria:  Patients under 18 years Patients not speaking Danish or Swedish, respectively, in Denmark and Sweden Patients unable to give informed consent Patients undergoing CRS+HIPEC or PE for cancers others than CRC Terminally ill patients