Prognostic value of right upper mediastinal lymphadenectomy in Sweet procedure for esophageal cancer.
BACKGROUND
The prognostic value of the right upper mediastinal lymph node dissection (RUMLND) for patients with middle or lower thoracic esophageal squamous cell carcinoma (ESCC-MLT) is still not well established yet. Our objective is to evaluate the prognostic role of the Sweet procedure plus right upper mediastinal lymph node dissection (MS) by comparing with the Sweet procedure with standard lymph node dissection (SS) in terms of long-term survival.


METHODS
Totally 1,477 ESCC-MLT patients underwent radical intent surgery (186 with MS, 1,291 with SS) at our department between January 2007 and September 2013. After propensity score matching (PSM), 186 patients from each group were matched and analyzed. The 5-year survival rates in two groups were compared by detailed stratifications in terms of clinical characteristics.


RESULTS
As for the prognostic role of RUMLND, patients treated with MS tended to obtain higher 5-year survival rate than patients treated with SS in univariate analysis (48.1%vs.37.4%). Moreover, in multivariate analysis, MS yielded significant higher 5-year survival rate compared with SS (P=0.041). In addition, subgroup analyses of the survival between the MS and SS patients by detailed stratifications demonstrated the survival superiority in the MS group with age <60 years old, TNM stage III, number of lymph node dissection (LND) ≥15, as well as no using of postoperative adjuvant treatment.


CONCLUSIONS
The RUMLND in Sweet procedure is an independent prognostic factor for ESCC-MLT patients, especially for those with thoracic middle segment-located tumor, stage III or younger.
Department of Thoracic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China;; Department of Thoracic Surgery, Chongqing Cancer Institute, Chongqing 400030, China.
Zhi-Qiang
ZQ
Wang
Department of Thoracic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China.
Han-Yu
HY
Deng
Department of Thoracic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China.
Yang
Y
Hu
Department of Thoracic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China.
Yong
Y
Yuan
Department of Thoracic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China.
Wen-Ping
WP
Wang
Department of Thoracic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China.
Yun-Cang
YC
Wang
Department of Thoracic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China.
Long-Qi
LQ
Chen
Esophageal squamous cell carcinoma (ESCC); lymphadenectomy; prognosis; sweet