Safety of Mid and Low Rectal Cancer Surgery Without Dissection of the No.253 Lymph Node (S-M-O-O-T-H)

Not Applicable

Recruiting

• Conditions: Rectal Cancer
• Interventions: Procedure: Dissection of the No.253 lymph node; Procedure: Omitting the dissection of the No.253 lymph node

• Registration Number: NCT06146946
• Lead Sponsor: Cancer Institute and Hospital, Chinese Academy of Medical Sciences

Brief Summary

The goal of this clinical trial is to learn about whether it is safe to omit dissection of the No.253 lymph nodes in mid and low rectal cancer surgery. The main question it aims to answer is that if it is possible to achieve the same long-term survival with and without the dissection of the No.253 lymph node in mid and low rectal cancer surgery. Participants will underwent laparoscopic rectal radical resection with or without the dissection of the No.253 lymph node.

Detailed Description

The No.253 lymph node, as the third station in the inferior mesenteric artery lymphatic system, plays a significant role in the lymphatic circulation of the descending colon, sigmoid colon, and rectum. They act as the last barrier for tumor metastasis from the regional to distant areas. However, there is still controversy regarding whether rectal cancer patients universally require dissection of the No.253 lymph node. The rate of metastasis to the No.253 lymph node in rectal cancer patients is extremely low, and dissection may not bring survival benefits. Additionally, postoperative urinary and sexual functions may be impaired due to damage to the sympathetic nerves. However, current prospective randomized controlled trials on the safety of omitting the dissection of the No.253 lymph node have small sample sizes and lack sufficient test power. Further confirmation is needed from large-sample prospective randomized controlled studies. Based on this, the investigator plans to collaborate with Peking Union Medical College Hospital, China-Japan Friendship Hospital, Chinese People's Liberation Army General Hospital, Shanghai Ruijin Hospital, Fudan Cancer Hospital, and West China Hospital of Sichuan University, totaling eight medical centers, to conduct a prospective randomized controlled study. This study aims to confirm the safety of mid and low rectal surgery without dissection of the No.253 lymph node, providing high-level evidence-based medical evidence for the implementation of this surgical technique.

Study Timeline

• Study First Submitted: 2023-11-18
• Study First Submitted QC: 2023-11-24
• Study First Posted: 2023-11-27
• Study Start: 2023-12-01
• Status Verified: 2025-03
• Last Update Submitted: 2025-03-24
• Last Update Posted: 2025-03-26
• Primary Completion: 2026-12-01
• Study Completion: 2029-12-01

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 1384

Inclusion Criteria

1. Patient age between 18-75 years.
2. Colonic biopsy pathology confirms adenocarcinoma.
3. At initial treatment, colonoscopy and imaging diagnose the tumor's lower edge as less than or equal to 7cm from the anus.
4. At initial treatment, imaging diagnoses the tumor T stage as less than or equal to 3.
5. At initial treatment, imaging diagnoses no enlarged lymph nodes at the root of the inferior mesenteric artery.
6. At initial treatment, imaging diagnoses the number of mesenteric metastatic lymph nodes as less than or equal to three.
7. Strong willingness for surgery and signed informed consent.

Exclusion Criteria

1. Previous history of malignant colorectal tumors.
2. Colonic biopsy pathology reveals mucinous adenocarcinoma or signet ring cell carcinoma.
3. Imaging diagnosis of distant metastasis.
4. Patients who have undergone multiple abdominal-pelvic surgeries or have extensive abdominal adhesions.
5. Patients with complications such as intestinal obstruction, intestinal perforation, or intestinal bleeding requiring emergency surgery.
6. Extensive lesions not amenable to R0 resection.
7. Diagnosed with other malignancies within the past five years.
8. ASA (American Society of Anesthesiologists) classification ≥ IV and/or ECOG (Eastern Cooperative Oncology Group) performance status score ≥ 2.
9. Patients with severe liver, kidney, cardiac, pulmonary, coagulation dysfunctions, or serious underlying diseases that cannot tolerate surgery.
10. History of severe mental illness.
11. Pregnant or breastfeeding women.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Dissection of the No.253 lymph node	Dissection of the No.253 lymph node	Perform surgery based on the principle of Total Mesorectal Excision (TME). During the procedure, fully expose the root of the Inferior Mesenteric Artery (IMA), thoroughly dissect the No.253 lymph node, and perform a high ligation along the artery at the root of the IMA; or expose the bifurcation of the left colonic artery, ligating the IMA at a low position distal to the origin of the left colonic artery, ensuring the dissection of the No. 253 lymph node while preserving the left colonic artery.
Omitting dissection of the No.253 lymph node	Omitting the dissection of the No.253 lymph node	Perform surgery based on the principle of Total Mesorectal Excision (TME), without denuding the root of the Inferior Mesenteric Artery (IMA) and without dissection of the No.253 lymph node. Ligation of the IMA is performed at a low position distal to the origin of the left colonic artery.

Primary Outcome Measures

Name	Time	Method
3-year disease free survival rate	3 years after surgery	Disease free survival refers to the length of time after primary treatment during which a patient survives without any signs or symptoms of the cancer.

Secondary Outcome Measures

Name	Time	Method
Postoperative urination and sexual function	1 year after surgery	Three months, six months, and one year postoperatively, evaluate patients' urinary and sexual functions using scales.
3-year overall survival rate	3 years after surgery	Overall survival refers to the length of time from the primary treatment that patients are still alive.
Incidence of postoperative complications	30 days after surgery	The proportion of short-term complications occurring within 30 days post-surgery
3-year local recurrence rate	3 years after surgery	Local recurrence refers to the return of cancer in the same area where it originally developed, typically after treatment has been completed.
Number of harvested lymph nodes	About 10 days after surgery	Total number of lymph nodes dissected in the pathology report
Intraoperative blood loss	Intraoperative	Total blood loss during the surgery
Operative duration	Intraoperative	total time spent performing a surgical procedure. This time is typically measured from the moment the surgery begins (marked by the initial incision) to its conclusion (marked by the closure of the surgical wound)

Trial Locations

Locations (8)

Cancer Hospital Chinese Academy of Medical Sciences; 🇨🇳 Beijing, Chaoyang district, China

Peking Union Medical College Hospital; 🇨🇳 Beijing, Beijing, China

China-Japan Friendship Hospital; 🇨🇳 Beijing, Beijing, China

Beijing Cancer Hospital; 🇨🇳 Beijing, Beijing, China

Chinese PLA General Hospital; 🇨🇳 Beijing, Beijng, China

Ruijin Hospital, Shanghai Jiaotong University School of Medicine; 🇨🇳 Shanghai, Shanghai, China

Fudan University Shanghai Cancer Center; 🇨🇳 Shanghai, Shanghai, China

West China Hospital Sichuan University; 🇨🇳 Chengdu, Sichuan, China