We identified eleven mutations in the APC gene, which is responsible for familial adenomatous polyposis; five mutations in the MLH1 and MSH6 genes, which are associated with Lynch syndrome; one mutation in the STK11 gene, responsible for the Peutz–Jeghers syndrome; and one heterozygous mutation in the MUTYH gene (which is responsible for the recessive polyposis syndrome, thus not listed in Table 3). This evidence concerns the gene STK11 and Lynch syndrome.