Comparison of long term survival outcomes between D1+ and D2 lymph node dissection for ≥ pT2 or pN+ gastric carcinoma: A large scale case-control study using propensity score matching. Issue 7 (July 2020)

• Record Type: Journal Article
• Authors: Kang, Ji Hoon; Ryu, Seong Yeob; Jung, Mi Ran; Jeong, Oh
• Is Part Of: European journal of surgical oncology. Volume 46:Issue 7(2020)
• Page Start: 1239
• Page End: 1246
• Publication Date: 2020-07
• Subjects: Gastric carcinoma -- Lymph node dissection -- Survival -- Gastrectomy; AGC Advanced gastric carcinoma -- ASA American Society of Anesthesiologists -- BMI Body mass index -- CT Computed tomography -- DFS disease free survival -- LND Lymph node dissection -- OS Overall survival -- PSM Propensity score matching -- RCT Randomized controlled trial -- TNM Tumor node metastasis; Oncology -- Periodicals; Cancer -- Surgery -- Periodicals; Medical Oncology -- Periodicals; Neoplasms -- surgery -- Periodicals; Cancer -- Chirurgie -- Périodiques; Cancérologie -- Périodiques; Oncologie; Chirurgie (geneeskunde); Electronic journals; Electronic journals -- Sciences; Electronic journals -- Medicine; Electronic journals; 616.994059005
• DOI: 10.1016/j.ejso.2020.04.013
• Languages: English
• ISSNs: 0748-7983

Abstract

Abstract: Background: D2 lymph node dissection (LND) is a widely performed as a standard procedure for advanced gastric cancer (AGC). However, there is little evidence supporting D2 over D1+ LND for gastric cancer treatment. This study compared the long-term outcomes of D2 and D1+ LND for AGC. Methods: We retrospectively reviewed data on 1121 patients who underwent curative distal gastrectomy and had pathologic stage of ≥ pT2 or pN+. The patients were categorized into the D1+ and D2 LND groups, and long-term survival was compared in the original and propensity score matching (PSM) cohorts. Results: Overall, 909 and 212 patients underwent D2 and D1+ LND, respectively. The D2 group showed more advanced stage and more frequently underwent open surgery. Postoperative morbidity was significantly higher in the D2 group (19.5% vs. 13.2%, p = 0.034); however, mortality or ≥ grade III complications did not significantly differ between the groups. The 5-year overall survival (OS) and disease-free survival (DFS) did not significantly differ between D2 and D1+ groups at the same stage. Multivariate analysis of prognostic factors revealed that the extent of LND did not significantly affect survival, after adjusting for tumor stage and other clinicopathological factors. In the PSM cohort, the D2 and D1 groups showed no significant difference in OS (p = 0.488) and DFS (p = 0.705). Conclusions: Long-term survival with D1+ LND was comparable to that with D2 LND for ≥ pT2 or pN + gastric carcinoma. A large randomized trial is warranted to validate the optimal extent of LND for gastric carcinoma.