Anal adenocarcinoma: Treatment outcomes and trends in a rare disease entity.

Abstract

538Background: Primary Adenocarcinoma of the rectum is a rare disease with a poor prognosis and thus tends to have a more aggressive treatment algorithm, typically involving a surgical approach. Prior to 2001, a few retrospective studies outlined improved outcomes with the incorporation of surgery with chemoradiation. However, since the publication of these studies, advancement in radiotherapy modalities and imaging have left the question of improved outcomes while reserving surgery for salvage. We conducted this NCDB-driven, retrospective study to analyze treatment trends and outcomes in the current time from 2004-2015 with respect to chemoradiation and surgery. Methods: We queried the NCDB for with AJCC stage 1-3 anal adenocarcinoma diagnosed between 2004-2015. Propensity score-matched multivariable cox regression analysis determined the association of incorporation of surgery into the definitive management of anal adenocarcinoma on survival. Results: Of the 1729 patients eligible patients in this study...