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). The gene discussed is MLH1; the disease is Lynch syndrome.