What are the AGA guidelines for colorectal cancer screening in patients with hereditary nonpolyposis colorectal cancer (HNPCC) (Lynch syndrome)?

Updated: Feb 25, 2020
  • Author: Elwyn C Cabebe, MD; Chief Editor: N Joseph Espat, MD, MS, FACS  more...
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The American Gastroenterological Association recommends testing all patients with colorectal cancer for Lynch syndrome. The tumor should be tested for MSI or with immunohistochemistry for MLH1, MSH2, MSH6, and PMS2 proteins. [12]

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