<prompt> Familial polysosis coli is associated withIntussusceptionToxic magacolonCancerUlcerative colitis  <response>: .HNCC hereditary nonpolyposis colonic cancer No polyps. Autosomal dominant Three members of the family have colonic cancers Lynch syndrome I is site specific - commonly right sided, occurs in early age group, 40 are metachronous Lynch syndrome II has other malignancy in, stomach, breast, ovary, endometrium and urinary bladder. It is cancer family syndrome Microsatellite instability MSI at DNA level occurs in HNCC Accounts for 3-5 of colonic cancers Amsterdam criteria I 1990; Amsterdam criteria II 1999 and revised Bethesda guidelines 2002 are used to diagnose HNCC ref:SRB;S manual of surgery,ed 3,pg no 835 