The goal of this study is to compare the postoperative anal function of patients with ultra-low rectal cancer after Parks operation (colon anal anastomosis) and Bacon operation (colon anal pull-out anastomosis), which may provide clinical evidence for the improvement of anal function and quality of life.
The main questions it aims to answer are: the difference of anal function 1 year after surgery type of study: clinical trial participant population: patients with low rectal cancer Participants will receive Parks operation of Bacon operation If there is a comparison group: Researchers will compare Parks and Bacon operation to see if the anal function 1 year after surgery is different.
Men or women, aged between 18 and 75 years;
Pathological diagnosis of rectal cancer before operation, with the distance from the lower edge of the tumor to the dentate line ≤ 3cm by MR imaging;
No local complications (including complete/ incomplete obstruction, active bleeding, local invasion of sphincter or levator ani, etc.) before operation;
Suitable for anal preservation surgery discussed by MDT;
Previous history of malignant colorectal tumors;
Complications such as obstruction and gastrointestinal bleeding that need an emergency operation;
Unachievable R0 resection due to invasion of adjacent organs by primary tumor;
Multiple primary tumors;
Sixth Affiliated Hospital, Sun Yat-sen University
Lead sponsor