Objective: To examine the long term outcome of splenic hilar lymphadenectomy (SHL) for locally advanced Siewert type Ⅱ and Ⅲ adenocarcinoma of esophagogastric junction (AEG) with a tumor diameter ≥4 cm. Methods: A total of 489 locally advanced Siewert type Ⅱ and Ⅲ AEG patients with a tumor diameter ≥4 cm who underwent radical resection from January 2010 to April 2016 were included. There were 383 males and 106 females. There were 225 patients aged≥65 years and 264 patients aged <65 years. SHL was conducted in 270 patients(SHL group). Wilcoxon rank-sum test or χ2 test were conducted for inter-group comparison. Cox proportional hazard regression was used to analyze the long term outcome of SHL and the prognosis factors of overall survival. Kaplan-Meier curve was drawn finally. The results of survival analysis were verified by Log-rank test. Results: Followed-up to April 2021,the median follow-up time was 78.0 months (range: 74.0 to 85.0 months), the follow-up rate was 95.5%(467/489). The splenic hilar lymphnode metastasis rate of the SHL group was 12.6% (34/270). Younger patients (<65 years old), less complications, higher proportion of patients received adjuvant chemotherapy were demonstrated in the SHL group (χ2: 5.644 to 6.744, all P<0.05). Multivariate analysis showed that SHL was the independent prognosis factor of overall survival for patients with Siewert type Ⅱ and Ⅲ AEG and a tumor diameter≥4 cm (HR=0.68, 95%CI: 0.52 to 0.88, P=0.004) along with preoperative CA19-9, pathological T stage, pathological N stage, adjuvant chemotherapy and postoperative complication. Further subgroup analysis demonstrated that the SHL group had better 5-year overall survival than non-SHL group (62.4% vs. 39.2%, χ2=17.983, P=0.006) in Siewert type Ⅲ AEG rather than in Siewert type Ⅱ AEG(57.3% vs. 53.7%, χ2=3.031, P=0.805). Conclusion: In experienced center, splenic hilar lymphadenectomy can improve the prognosis of Siewert type Ⅲ AEG with a tumor diameter ≥4 cm.
目的： 探讨肿瘤最大径≥4 cm的局部进展期Siewert Ⅱ、Ⅲ型食管胃结合部腺癌（AEG）行脾门淋巴结清扫的远期疗效。 方法： 回顾性分析2010年1月至2016年4月489例在福建医科大学附属协和医院胃外科接受根治性切除的肿瘤最大径≥4 cm的局部进展期Siewert Ⅱ、Ⅲ型AEG患者的资料。男性383例，女性106例，年龄≥65岁者225例，<65岁者264例。接受脾门淋巴结清扫270例（清扫组），未接受脾门淋巴结清扫219例（未清扫组）。组间资料比较采用Wilcoxon秩和检验或χ2检验，采用Cox比例风险模型分析脾门清扫与术后总体生存的关系，Kaplan-Meier法绘制生存曲线，Log-rank检验分析组间总体生存率的差异。 结果： 随访截至2021年4月，中位随访时间为78.0个月（范围：74.0~85.0个月），随访率为95.5%（467/489）。清扫组患者脾门淋巴结转移率为12.6%（34/270）。与未清扫组相比，清扫组年龄<65岁比例更高、术前合并症更少，术后接受辅助化疗的比例更高（χ2∶5.644~6.744，P值均˂0.05）。多因素分析结果显示，脾门淋巴结清扫是此类型AEG患者总体生存的预后因素（HR=0.68，95%CI：0.52~0.88，P=0.004），术前CA19-9、病理T分期、病理N分期、辅助化疗和术后并发症亦是该类患者总体生存的预后因素（P值均˂0.05）。亚组分析结果显示，Siewert Ⅱ型患者中，清扫组与未清扫组的5年总体生存率相当（57.3%比53.7%，χ2=3.031，P=0.805）；Siewert Ⅲ型患者中，清扫组优于未清扫组（62.4%比39.2%，χ2=17.983，P=0.006）。 结论： 在腹腔镜手术经验成熟的中心，对肿瘤最大径≥4 cm的局部进展期Siewert Ⅲ型AEG行脾门淋巴结清扫能改善患者的远期预后。.