To the editor:

Thank you for publishing our article titled “Accuracy of Preoperative Local Staging of Primary Colorectal Cancer by Using Computed Tomography: Reappraisal Based on Data Collected at a Highly Organized Cancer Center” in Annals of Coloproctology of October 2017 issue. In the original publication, we found a mistake in Institutional Review Board (IRB) approval number. At the time of submission, we checked this, but it missed at the publication. We forgot to check it at correction period. The mistake was not due to the editorial office of The Korean Society of Coloproctology. We attached a corrigendum along with this letter to request for addition of funding statement.

We want to add funding statement in ACKNOWLEDGMENTS section of this article.

The IRB approval number should be corrected as follows.

AJIRB-MED-MDB-17-351