The expression patterns of p53 isoforms were studied in various cell lines, such as colorectal adenoma, renal cell carcinoma, mucinous ovarian cancer, serous ovarian cancer, breast cancer, cholangiocarcinoma, acute myeloid leukemia (AML), squamous cell carcinoma of the head and neck (SCCHN), and melanoma cell lines. This evidence concerns the gene TP53 and cholangiocarcinoma.