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Under general endotracheal anesthesia, Five or six ports are used. Lymph node dissection and ligation of vessels are carried out in the laparoscopic field. A partial omentectomy encompassing perigastric nodes is performed laparoscopically. D2 lymphadenectomy is carried out according to the guidelines of the "The Japanese Research Society for Gastric Cancer" for the corresponding location of the primary tumor. A 5- to 6-cm small incision is made transversely in RUQ of the abdomen. Through the incisional window, the stomach is removed from the abdominal cavity and resected. A Billroth-I gastroduodenostomy using an EEA stapler and GIA or a Billroth-II gastrojejunostomy with a hand-sewing technique is performed. The abdomen is then closed after hemostasis is achieved.

Laparoscopic D2 distal gastrectomy

Young-Woo Kim, MD, PhD

Objectives of this study was to determine whether laparoscopy-assisted distal gastrectomy (LADG) with complete D2 lymph node dissection for gastric cancer is a safe and effective surgical option.

Methods: total 64 patients, who are diagnosed preoperatively as having T1-2, N0-1 or M0 gastric cancer, will be prospectively enrolled to undergo LADG with D2 lymph node dissection; two surgeons with experience of over 50 cases of laparoscopic gastrectomy performed the procedures. The compliance rate, defined as cases with no more than one missing lymph node station according to the Japanese Research Society of Gastric Cancer (JRSGC) lymph node grouping, for the open gastrectomy with D2 lymph node dissection was 66.0% in a pilot study and was used for calculations of sample size. Compliance rate and other surgical outcomes, including the number of retrieved lymph nodes from each lymph node station, morbidities, mortalities and conversion rate will be analyzed.

Gastric cancer is the most common cancer in Korea; the overall age-standardized incidence rates of gastric cancer in Korea have been reported to be 69.6 per 100,000 among males and 26.8 per 100,000 among females in 2000.

Treatment modalities for resectable gastric cancer include endoscopic mucosal resection (EMR), laparoscopy-assisted gastrectomy (LAG) and conventional open gastrectomy. Laparoscopic cancer surgery has been reported to be an acceptable alternative to open surgery in patients with colorectal cancer. However, in gastric cancer, laparoscopic surgery has not yet been validated and, thus, is performed only in a limited number of patients with early gastric cancer; this is due to the technical difficulty in systematic lymph node dissection. For the treatment of advanced gastric cancer (AGC), in countries including Korea and Japan, gastrectomy with D2 lymph node dissection has been the standard operation. With the recent progress in diagnostic techniques, accumulation of experience with laparoscopy-assisted distal gastrectomy (LADG) for early gastric cancer and the increasing interest in a better quality of life, there has been an effort to apply minimally invasive techniques to the treatment of AGC. However, there has been no clinical trial to test the oncological feasibility of LADG with D2 lymph node dissection. There is only one phase-II study that evaluated whether the morbidity associated with LADG was higher than that of open gastrectomy.

Before the indications for LADG can be extended to include patients with advanced cancer, the status of surgical expertise for complete D2 lymph node dissection requires investigation using a prospective clinical study design. If this approach is shown to be feasible, a randomized prospective clinical trial, to compare survival and other surgical outcomes, would be the next step in validating this technique for this group of patients.

This study is to be performed according to the Helsinki Declaration. The study was approved by the Ethics Subcommittee at the National Cancer Center for Research Involving Human Subjects (no. NCCCTS-2005181). All patients will be provided written informed consent before entering the study.

Sample size The sample size was based on the alpha error at 0.05 and 90% of power and the accepted margin of the difference in the compliance rate at 10% based on a non-inferiority test. The target was chosen from the primary end point of the study. For the patients who underwent LADG with D2 lymph node dissection, the compliance rate-defined as cases in which there was no more than one missing lymph node station according to the guidelines of "The Japanese Research Society for Gastric Cancer" (JRSGC) lymph node grouping,11,12-was set up to 55%; for the patients with open distal gastrectomy with D2 lymph node dissection, it was 66%, based on a pilot study. We performed a pilot study to determine the compliance rate in 100 cases of open distal gastrectomy with D2 lymph node dissection before enrollment started. When the data was used for the formula, the total sample size required was determined to be 60 patients. When we added 10% for expected follow-up loss, the total sample size was calculated to be 66 patients.

Clinical Trial for Laparoscopic D2 Gastrectomy

A Phase-II Clinical Trial of Laparoscopy-Assisted Distal Gastrectomy With D2 Lymph Node Dissection for Gastric Cancer

noncompliance : if two or more nodal station is vacant, it is a noncompliant D2 gastrectomy.

intra, and postopertive complications related to operation.

National Cancer Center, Korea

Young-Woo Kim/ head

Symptoms and General Pathology

Postoperative Complications

Laparoscopic D2 distal gastrectomy after 3-Cycle XELOX neo-adjuvant chemotherapy

Jian-Kun Hu, M.D. Ph.D.

Wei-Han Zhang, M.D. Ph.D.

Zi-Yu Li, M.D.

Zi-Yu Li, M.D., Ph.D.

Lin Chen

Pei-Wu Yu, M.D.,Ph.D.

Chang-Ming Huang

Yong Li, M.D., Ph.D.

Guo-Xin Li

Kuan Wang

Ze-Kuan Xu

Jian Suo

Yi-Hong Sun, M.D., Ph.D.

Hua Huang

Gang Zhao

Lu Zang

Xian-Li He, M.D.,Ph.D.

Xian-Li He, M.D.

Jian-Kun Hu

Yong Wang

Gastric cancer is the third major cancer of global cancer-related death. In China, the early diagnosis rate of gastric cancer is relatively low, and most patients are with locally advanced tumor stage. The neoadjuvant chemotherapy (NAC) can bring the survival advantage for gastric cancer patients with locally advanced tumor stage. The primary goal of NAC is to control the micrometastasis and/or progression of the primary lesion in order to improve potential of radical gastrectomy. NAC is recommended for patients with locally advanced stage (T2-4Nx) according to the latest NCCN Gastric Cancer Guidelines.

Laparoscopy distal gastrectomy (LDG) can achieve a better postoperative short-term recovery than the traditional open distal gastrectomy (ODG), which can reduce the intraoperative blood loss and to shorten the postoperative hospital stay. Therefore, Enhanced Recovery After Surgery program of gastric cancer surgery recommends the use of minimally invasive surgery. For long-term survival outcomes, there is limited evidence supported that laparoscopic gastrectomy is comparable open gastrectomy. Therefore, due to the lack of high-quality prospective clinical trial results, whether advanced tumor is suitable for laparoscopic surgery is still controversial. Therefore, some multi-center prospective randomized controlled trials have been carried out, compared safety and long-term survival outcome between laparoscopic and open gastrectomy in locally advanced gastric cancer patients. CLASS-01 trials reported that for locally advanced gastric cancers, laparoscopic D2 distal gastrectomy is safe and feasible.

Patient's surgical tolerance and stress response may be inhibited after the treatment of NAC. The aim of this trial is to confirm the safety of laparoscopy distal D2 radical gastrectomy for the treatment of after neoadjuvant chemotherapy gastric cancer patients (cT3-4a, N+, M0) in terms of postoperative complications.

This is a prospective, multi-centers, open-label, single-arm study, and the aim of this trial is to evaluate the safety of laparoscopic distal D2 radical gastrectomy for the treatment of locally advanced gastric cancer (cT3-4a, N-/+, M0) after neoadjuvant chemotherapy.

Laparoscopic D2 Distal Gastrectomy Following Neoadjuvant Chemotherapy for Locally Advanced Gastric Cancers

Laparoscopic D2 Distal Gastrectomy Following Neoadjuvant Chemotherapy for Locally Advanced Gastric Cancers: A Prospective Multicenter Trial

The proportion value will be calculated by the number of patients with any operative complication as the numerator and the number of patients undergoing surgical treatment as the denominator.

Mortality will be calculated as the ratio between the number of patients who died as numerator and number of all patients undergoing surgical treatment as the denominator.

Number of patients underwent gastrectomy for the denominator, number of R0 resection patients is numerator, the ratio is the R0 resection rate. The definition of R0 resection is according to the Japanese gastric cancer treatment guidelines 2014 (ver. 4)（Gastric Cancer. 2017 Jan;20(1):1-19.）.

Ratio will be calculated with the number of patients complete the laparoscopic gastrectomy as the numerator, and number of all patients undergoing laparoscopic surgical treatment as the denominator.

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
Clinical Trial for Laparoscopic D2 Gastrectomy	NCT01163812	Gastric Cancer	Laparoscopic D2...	18 Years - 75 Years	National Cancer Center, Korea
Laparoscopic D2 Distal Gastrectomy Following Neoadjuvant Chemotherapy for Locally Advanced Gastric Cancers	NCT03468712	Complications, ... Surgery--Compli... Cancer of Stoma... Chemotherapy Ef...	Laparoscopic D2...	18 Years - 75 Years	West China Hospital

Spots Global Cancer Trial Database for laparoscopic d2 distal gastrectomy