ITGAE and rectum adenocarcinoma: RNA sequencing (RNA-seq) data of 569 CRC cases with prognostic data (420 colon adenocarcinoma [COAD] and 149 rectal adenocarcinoma [READ] cases) were downloaded from The Cancer Genome Atlas (TCGA; http://tcga-data.nci.nih.gov) data portal, and gene expression levels that correlated with the CD103 level were analysed to investigate the role of CD103 in CRC.