CALU and digestive system neoplasm: In The Cancer Genome Atlas data, higher expression of CALU was found in colon mucinous adenocarcinoma (fold change = 3.107), in cecum adenocarcinoma (fold change = 2.583), in rectal adenocarcinoma (fold change = 2.948), and in colon adenocarcinoma (fold change = 2.601) compared to normal samples (Table 1).