title: A high number of stromal tumor-infiltrating lymphocytes is a favorable independent prognostic factor in M0 (stages I-III) esophageal squamous cell carcinoma.
abstract: Esophageal cancer is a highly invasive tumor with a poor prognosis. Lymphocytes play an important role in systemic immune responses, but their role in cancers varies depending on the specific tumor microenvironment. The aim of this study was to provide evidence for tumor-infiltrating lymphocytes (TILs) as a prognostic biomarker in esophageal squamous cell carcinoma. TIL analysis was retrospectively performed on full-face hematoxylin and eosin-stained sections from 127 patients. A majority (92.6%) of tumors had at least 10% stromal TILs (sTILs) (range, 10%-90%), and 84.3% of cancers had at least 10% intraepithelial TILs (iTILs) (range, 10%-40%). Multivariate analysis showed progressively better overall survival (P < 0.001, hazard ratio = 0.968, 95% confidence interval 0.955-0.981) and disease-free survival (P = 0.005, hazard ratio = 0.982, 95% confidence interval 0.970-0.995) in patients with higher sTILs. Marginal increases in overall survival and disease-free survival were found in the higher iTILs cohort versus the lower iTILs cohort, but the difference was not significant. In conclusion, in addition to tumor stage increasing stromal lymphocytic infiltration is an independent prognostic factor for esophageal squamous cell carcinoma treated by radical resection.
authors.affiliation: Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hubei Province, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hubei Province, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Tang
authors.affiliation: Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hubei Province, China.
authors.forename: Liu
authors.initials: L
authors.lastname: Huang
authors.affiliation: Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hubei Province, China.
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Yu
authors.affiliation: Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hubei Province, China.
authors.forename: Guangyuan
authors.initials: G
authors.lastname: Hu
authors.affiliation: Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hubei Province, China.
authors.forename: Yanmei
authors.initials: Y
authors.lastname: Zou
authors.affiliation: Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hubei Province, China.
authors.forename: Xianglin
authors.initials: X
authors.lastname: Yuan
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D018572:Disease-Free Survival; D004938:Esophageal Neoplasms / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D000077277:Esophageal Squamous Cell Carcinoma; D016629:Esophagectomy; D005260:Female; D006801:Humans; D016246:Lymphocytes, Tumor-Infiltrating / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009367:Neoplasm Staging; D011379:Prognosis; D016016:Proportional Hazards Models; D012189:Retrospective Studies; D015996:Survival Rate
keywords: disease-free survival; esophageal squamous cell carcinoma; overall survival; prognostic factor; tumor-infiltrating lymphocyte