8. Comorbidities (Time Frame - day of surgery): Charlson index
9. Perioperative complications (Time Frame - 90 days): Reporting and grading of postoperative surgical complications (according to Dindo-Clavien classification and/or comprehensive complications index)
10. Histological results (Time Frame - 30 days): Histological staging and grading of the specimen by a pathologist
11. Quality of life, including functional and symptom scales, incontinence scores, sexual function (Time Frame - 10 years): taTME survey (validated english, german, french versions); from 0 (worst) to 100 (best)
Secondary outcome:
1. Perioperative treatment (Time Frame - 10 years): Chemoradiation before or after surgery, other treatments necessary
2. Surgery time (Time Frame - day of surgery): Duration of surgery in minutes
3. Length of hospital stay (Time Frame - 90 days): Length of hospital stay in days
4. Readmission rate (Time Frame - 90 days): Number of patients readmitted within 90 days of index surgery divided by the total number of patients operated
5. Costs (Time Frame - 10 years): At the level of individual patient Cost in terms of hospital charges and expenses in Swiss Francs. Actual costs and micro-costing