DO CARCINOMAS OF THE RECTOSIGMOID JUNCTION BELONG TO THE UPPER RECTUM OR SIGMOID COLON?

Interventions: Group 1: A retrospective analysis of all patients operated on for a carcinoma in the sigmoid colon, the rectosigmoid junction and the upper rectum between the years 2004 and 2014 will be performed.
The objective of this study is to determine whether carcinomas of the rectosigmoid junction have to be considered independently or can be assigned to the upper rectum or to the sigmoid colon taking into account tumor characteristics and the oncological outcome.
Primary outcome(s): Patient and tumor characteristics: evaluation of perioperative findings; oncological outcome (tumor recurrence and death); Query by a standardized questionnaire (via mail or telephone interview) or by a query from the local cancer registry (follow-up in the median: 44 months)
Study Design: Allocation: ; Masking: ; Control: ; Assignment: ; Study design purpose: other