Chapter 4 Mean age of tumor onset in hereditary nonpolyposis colorectal cancer (HNPCC) families correlates with the presence of mutations in DNA mismatch repair genes. Pensotti V, Radice P, Presciuttini S, Calistri D, Gazzoli I, Grimalt Perez A, Mondini P, Buonsanti G, Sala P, Rossetti C, Ranzani GN, Bertario L and Pierotti MA. Genes, Chromosomes & Cancer 1997 Jul; 19(3):135-42. This is a preprint of an article published in Volume 19, Issue 3, Pages 135-142. Genes, Chromosomes & Cancer and the International Journal of Cancer © 1997 Wiley-Liss, Inc., A Wiley Company. URL://www.interscience.Wiley.com/ .