PCDH18 and colorectal carcinoma: In an attempt to identify PCDH18 involved in colorectal carcinogenesis, the Cancer Genome Altas (TCGA) expression array dataset of 145 CRC tissue samples and 22 paired normal samples as well as Hong colorectal dataset of 70 CRC tissue samples and 12 normal samples were obtained from Oncomine database for comparative genome-wide analyses of PCDH18 expression.