Retrospective review of total neoadjuvant therapy

作     者：Laila Babar Veli Bakalov Stephen Abel Obaid Ashraf Gene Grant Finley Moses S Raj Kristina Lundeen Dulabh K Monga Alexander V Kirichenko Rodney E Wegner 

作者机构：Department of Internal MedicineAllegheny General HospitalPittsburghPA 15212United States Department of Radiation OncologyAllegheny General HospitalPittsburghPA 15212United States Department of Medical OncologyAllegheny General HospitalPittsburghPA 15212United States 

出 版 物：《World Journal of Gastrointestinal Oncology》 (世界胃肠肿瘤学杂志（英文版）（电子版）)

年 卷 期：2019年第11卷第10期

页      面：857-865页

核心收录：

学科分类：1002[医学-临床医学] 10[医学] 

主　　题：Total neoadjuvant therapy Neoadjuvant chemoradiation Multi-agent chemotherapy Locally advanced rectal cancer National cancer database Colorectal cancer Retrospective review Gastrointestinal oncology Temporal trends Surgical excision 

摘      要：BACKGROUND Neoadjuvant chemoradiotherapy(nCRT)followed by resection and postoperative multi-agent chemotherapy(maChT)is the standard of care for locally advanced rectal cancer.Using this approach,maChT administration can be delayed for several months,leading to concern for distant metastases.To counteract this,a novel treatment approach known as total neoadjuvant therapy(TNT)has gained popularity,in which patients receive both maChT and nCRT prior to resection.We utilized the National Cancer Database to examine temporal trends in TNT usage,and any potential effect on survival.AIM To study the temporal trends in the usage of TNT and evaluate its efficacy compared to neoadjuvant chemoradiation.METHODS We queried the National Cancer Database for patients with locally advanced rectal cancer,Stage II-III,from 2004-2015 treated with nCRT or TNT.TNT was defined as maChT initiated≥90 d prior to nCRT initiation.Overall survival was calculated from the date of diagnosis to the date of last contact or death using Kaplan-Meier curves to present the cumulative probability of survival,with logrank statistics to assess significance.Multivariable cox regression was used to identify predictors of survival and propensity score analysis accounted for bias.RESULTS We identified 9066 eligible patients,with 8812 and 254 patients receiving neoadjuvant chemoradiation followed by maChT and TNT,respectively.Nodal involvement,stage III disease,and treatment in recent years were predictive of TNT use.There was greater use of TNT with more advanced stage,specifically1 node involved(odds ratio[OR]=2.88,95%confidence interval[CI]:2.11-3.93,P0.01)and stage III disease(OR=2.88,95%CI:2.11-3.93,P0.01).From 2010 to 2012 the use of TNT increased(OR=2.41,95%CI:1.27-4.56,P0.01)with a greater increase from 2013 to 2015(OR=6.62,95%CI:3.57-12.25,P0.01).Both the TNT and neoadjuvant chemoradiation arms had a similar 5-year survival at 76%and 78%respectively.Multivariable analysis with propensity score demonstrated that increased age,high comorbidity score,higher grade,African American race,and female gender had worse overall survival.CONCLUSION Our data demonstrates a rising trend in TNT use,particularly in patients with worse disease.Patients treated with TNT and nCRT had similar survival.Randomized trials evaluating TNT are underway.