Tumor-stroma ratio as prognostic factor for survival in rectal adenocarcinoma: A retrospective cohort study
René Scheer, Annefleur E M Berkel, Joost M Klaase, Department of Surgery, Medisch Spectrum Twente, Enschede 7500 KA, The Netherlands
Alexi Baidoshvili, Shorena Zoidze, Laboratory for Pathology East-Netherlands, Hengelo 7550 AM, The Netherlands
Marloes A G Elferink, Netherlands Comprehensive Cancer Organization, Location Enschede, Enschede 7511 JP, The Netherlands
Paul J van Diest, Department of Pathology, University Medical Center Utrecht, Utrecht 3508 GA, The Netherlands
Author contributions: Scheer R and Klaase JM designed the research; Scheer R and Zoidze S performed the research; Baidoshvili A supervised the histological scoring and took final decisions in case of discrepancy in scores between Scheer R and Zoidze S; Elferink MAG collected data from the population-based The Netherlands Cancer Registy and analyzed the data; Berkel AEM, Klaase JM and van Diest PJ supervised and interpreted the results; Scheer R and Zoidze S wrote the paper; all authors critically reviewed and accepted the final version of the manuscript.
Institutional review board statement: The requirement for informed consent and ethical approval was waived because of the retrospective study design. The study is conducted in accordance with the Declaration of Helsinki and Good Clinical Practice guidelines.
Conflict-of-interest statement: The authors declare no conflict of interests.
Data sharing statement: Technical appendix, statistical code, and dataset available from the corresponding author at email@example.com. Participants’ informed consent was not obtained, but the presented data are anonymized and risk of identification is low.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Joost M Klaase, MD, PhD, Surgical-Oncologist, Department of Surgery, Medisch Spectrum Twente, PO Box 50.000, Enschede 7500 KA, The Netherlands. firstname.lastname@example.org
Telephone: +31-53-4873441 Fax: +31-53-4872526
Received: June 22, 2017
Peer-review started: July 14, 2017
First decision: August 7, 2017
Revised: September 17, 2017
Accepted: October 15, 2017
Article in press: October 15, 2017
Published online: December 15, 2017