The aim of this study is to review the treatment strategies of locally advanced colorectal cancer and locally recurrent rectal cancer in Västra Götaland during 1995-2016. The aim is to evaluate time trends and outcome both related to morbidity and cancer specific survival, we will also evaluate the results after advanced reconstruction. The study will identify the population using the Swedish ColoRectal Cancer Registry and then the individual patient charts will be reviewed. The data will be collected in a clinical record form covering demography (age, sex, co-morbidity, BMI and diagnoses) as well as treatments strategy, surgical procedures, re-operations, complications, readmissions, hospital stay, stoma formation etc.