H-Z Qiu1, B Wu, Y Xiao, G-L Lin. 1. Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences/Peking Union Medical College, Beijing, China. Qiuhzpumc@yahoo.com.cn
Abstract
AIM: The study aimed to identify the factors predictive for extreme unresponsiveness to neoadjuvant therapy for rectal cancer. METHOD: Ninety-six patients with rectal cancer received neoadjuvant therapy (41 were treated with radiotherapy and 55 with chemoradiotherapy) before surgery. Tumour response, downstaging, pathological complete response (pCR) and disease-free survival were evaluated. RESULTS: Tumour response, downstaging and pCR occurred in 70 (72.9%), 47 (49.0%) and 14 (14.6%) patients, respectively. Univariate analyses showed that a large tumour size, T4 stage, elevated serum tumour markers, poor differentiation, radiotherapy alone and mucinous tumour were indicators of poor tumour response and/or downstaging. On multivariate analysis, chemoradiotherapy was found to be predictive for tumour response and downstaging, whereas mucinous type and T4 stage negatively affected tumour response. No variable was found to be associated with pCR, but poor differentiation and T4 stage together predicted extreme unresponsiveness with a high specificity and a high positive predictive value. Very poor disease-free survival was also observed in patients simultaneously carrying these phenotypes. CONCLUSION: Neoadjuvant chemoradiotherapy is superior to radiotherapy alone in producing a response of rectal cancer. Unresponsiveness was most likely to occur in patients with poor differentiation and T4 disease.
AIM: The study aimed to identify the factors predictive for extreme unresponsiveness to neoadjuvant therapy for rectal cancer. METHOD: Ninety-six patients with rectal cancer received neoadjuvant therapy (41 were treated with radiotherapy and 55 with chemoradiotherapy) before surgery. Tumour response, downstaging, pathological complete response (pCR) and disease-free survival were evaluated. RESULTS:Tumour response, downstaging and pCR occurred in 70 (72.9%), 47 (49.0%) and 14 (14.6%) patients, respectively. Univariate analyses showed that a large tumour size, T4 stage, elevated serum tumour markers, poor differentiation, radiotherapy alone and mucinous tumour were indicators of poor tumour response and/or downstaging. On multivariate analysis, chemoradiotherapy was found to be predictive for tumour response and downstaging, whereas mucinous type and T4 stage negatively affected tumour response. No variable was found to be associated with pCR, but poor differentiation and T4 stage together predicted extreme unresponsiveness with a high specificity and a high positive predictive value. Very poor disease-free survival was also observed in patients simultaneously carrying these phenotypes. CONCLUSION: Neoadjuvant chemoradiotherapy is superior to radiotherapy alone in producing a response of rectal cancer. Unresponsiveness was most likely to occur in patients with poor differentiation and T4 disease.
Authors: Jong Wan Kim; Hyun Chul Kim; Ji Won Park; Sung Chan Park; Dae Kyung Sohn; Hyo Seong Choi; Dae Yong Kim; Hee Jin Chang; Ji Yeon Baek; Sun Young Kim; Seok Ki Kim; Jae Hwan Oh Journal: Int J Colorectal Dis Date: 2013-02-13 Impact factor: 2.571
Authors: Frederik J van der Sluis; Henderik L van Westreenen; Boudewijn van Etten; Barbara L van Leeuwen; Geertruida H de Bock Journal: Int J Colorectal Dis Date: 2017-12-15 Impact factor: 2.571
Authors: Leonardo S Lino-Silva; Armando Gamboa-Domínguez; Diego Zúñiga-Tamayo; Rosa A Salcedo-Hernández; Lucely Cetina; David Cantú-de-León Journal: World J Clin Oncol Date: 2018-11-10