Introduction
cancer, deaths, rectal cancer
CANCER, RECTAL CANCER, POSTOPERATIVE COMPLICATIONS
There were 4.064 million new cases of cancer and 2.413 million new deaths occurred in 2016 and showing a continuing upward trend in China [Even so, there are numerous ways to treat rectal cancer, including surgery, radiation, chemotherapy, molecular targeted therapies, immunotherapies, and Chinese herbal medications. Some molecular targeted drugs, such as cetuximab, panitumumab and bevacizumab, have been shown to play important roles in the treatment of rectal cancer [Different scholars have different opinions regarding laparoscopic radical surgery for rectal cancer, and many studies have been performed on the dissection of No.253 lymph nodes, but few clinical studies have been conducted on the preservation of the IMA sheath during the dissection of No.253 lymph nodes. In the past, we thought that peeling the IMA sheath would increase the detection rate of No.253 lymph nodes in patients with rectal cancer [We designed this prospective randomized controlled study to investigate whether preserving the IMA sheath is more advantageous in lymph node dissection treatment and postoperative complications compared to peeling the IMA sheath to clean the lymph nodes at the root of the IMA.