1. Identification and Validation of Lymphovascular Invasion as a Prognostic and Staging Factor in Node-Negative Esophageal Squamous Cell Carcinoma 
Qingyuan Huang, MD, Kongjia Luo, MD, PhD, Chun Chen, MD, PhD, Geng Wang, MD, Jietian Jin, MD, Min Kong, MD, Bifeng Li, MD, Qianwen Liu, MD, Jinhui Li, MB, Tiehua Rong, MD, PhD, Haiquan Chen, MD, PhD, Lanjun Zhang, MD, PhD, Yuping Chen, MD, PhD, Chengchu Zhu, MD, PhD, Bin Zheng, MD, Jing Wen, MD, PhD, Yuzhen Zheng, MD, Zihui Tan, MD, Xiuying Xie, BE, Hong Yang, MD, PhD, Jianhua Fu, MD, PhD 
Journal of Thoracic Oncology 
Volume 11, Issue 4, Pages (April 2016)
DOI: /j.jtho
Copyright © 2016 International Association for the Study of Lung Cancer Terms and Conditions

2. Figure 1
Kaplan-Meier survival analysis. (A) Disease-specific survival and (B) disease-free survival curves for patients in the primary cohort according to lymphovascular invasion status. (C) Node-negative and (D) node-positive subsets of the primary cohort according to lymphovascular invasion status. LVI, lymphovascular invasion.
Journal of Thoracic Oncology  , DOI: ( /j.jtho )
Copyright © 2016 International Association for the Study of Lung Cancer Terms and Conditions

3. Figure 2
Time-dependent receiver operating characteristic analysis. The area under the curve for the risk score involving the combination of lymphovascular invasion status and the T classification remained higher than those for the tumor, node, and metastasis system and other factors alone among node-negative patients in the primary cohort (A) and the validation cohort (B). LVI, lymphovascular invasion; TNM, tumor, node, and metastasis; T, tumor.
Journal of Thoracic Oncology  , DOI: ( /j.jtho )
Copyright © 2016 International Association for the Study of Lung Cancer Terms and Conditions

4. Figure 3
(A) Disease-specific survival curves for T2–3N0M0 disease according to the stage in the seventh edition of the staging system for esophageal carcinoma. (B) Disease-specific survival curves for T2N0M0 without lymphovascular invasion (LVI), T2N0M0 with LVI, and T2N1M0 disease. (C) Disease-specific survival curves for T3N0M0 without LVI, T3N0M0 with LVI, and T3N1M0 disease. (D) Disease-specific survival curves for T1N0M0 without LVI, T1N0M0 with LVI, and T1N1M0 disease. LVI, lymphovascular invasion.
Journal of Thoracic Oncology  , DOI: ( /j.jtho )
Copyright © 2016 International Association for the Study of Lung Cancer Terms and Conditions