ITGB1 and cancer: Positive ITGB1 protein expression was detected in 77.9% (148/190) of intestinal‐type cancers, 40.7% (59/145) of diffuse‐type cancers, 53.1% (34/64) of mixed‐type cancers, and 77.8% (14/18) of indeterminate‐type cancers.