A screening method for identifying an individual having a pre-disposition towards having a cancer is disclosed, which screening method comprises the steps of: (a) obtaining a test sample comprising a nucleotide sequence comprised in the MYH gene of the individual or an amino acid sequence of a polypeptide expressed thereby; and (b) comparing a region of the test sample sequence with the corresponding region of the wild type sequence, whereby a difference between the test sample sequence and the wild type sequence signifies that the individual is pre-disposed to having the cancer; and wherein the difference comprises a specified variation.