Guidelines:


Lynch Syndrome
Revised guidelines for the clinical management of Lynch syndrome (HNPCC): recommendations by a group of European experts.
Gut. 2013 Jun;62(6):812-23. doi: 10.1136/gutjnl-2012-304356. Epub 2013 Feb 13.

FAP
Guidelines for the clinical management of familial adenomatous polyposis (FAP)
Gut. 2008 May;57(5):704-13. doi: 10.1136/gut.2007.136127. Epub 2008 Jan 14.

CMMRD
Guidelines for surveillance of individuals with constitutional mismatch repair-deficiency proposed by the European Consortium “Care for CMMR-D” (C4CMMR-D).
J Med Genet. 2014 May;51(5):283-93. doi: 10.1136/jmedgenet-2013-102238. Epub 2014 Feb 20.

NCCN Guidelines
https://www.nccn.org/professionals/physician_gls/default.aspx#genetics_colon