American Gastroenterological Association Institute Guideline on the Diagnosis and Management of Lynch Syndrome

This clinical practice guideline provides recommendations on the diagnosis of Lynch syndrome in patients without a personal history of colorectal or another cancer but with a family history suggestive of Lynch syndrome, as well as for patients with colorectal cancer with IHC absent for MLH1. Management of the risk of colorectal cancer for patients with Lynch syndrome is also discussed with a review of surveillance colonoscopy and recommendations on the use of aspirin as a preventative measure for cancer. Outcomes of interest include sensitivity, specificity, false-positive and false-negative rates of diagnostic tests, as well as psychological distress/quality of life, colorectal cancer incidence, staging, and mortality, Lynch-syndrome associated cancer incidence and mortality, surgical complications from colonoscopy, and costs.