The National Comprehensive Cancer Network (NCCN) released new guidelines for 2020 on July 21, 2020. The big changes included refining some of the risks for genes involved in Lynch Syndrome, and providing specific guidance about cancer screening that may slightly differ by gene.
You can check out the full guidelines by creating a FREE account at: https://www.nccn.org/professionals/physician_gls/pdf/genetics_colon.pdf