This has stimulated the prospect to implement a dependable, reasonable and simple approach for Colo rectal detection . The SPG20 gene is situated in chromosome band 13q13.3; the SPG20 gene converts the spartin protein, which is a multi functional protein that has formerly been recognized to be complicated in intra cellular epidermal growth factor receptor trading , The serine-threonine kinase 31 (STK31) gene was initially identified through cDNA subtraction as a testis-specific protein kinase gene expressed in mouse spermatogonia . Recently, STK31 has been described as a novel cancer testis (CT) antigen, highly expressed in Gastrointestinal cancer cells (colo rectal, gastric and esophageal cancer), while restricted to testis and fetal brain in normal tissues .