For example, data based on cDNA sequencing and gene silencing showed that Btk is also expressed in the colorectal adenocarcinoma cell line HT‐29,11 and a novel isoform of Btk, Btk‐C, is considerably overexpressed in tumorigenic breast cells rather than in normal breast cells.12 The gene discussed is BTK; the disease is colorectal adenocarcinoma.