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GTR Home > Conditions/Phenotypes > Lynch syndrome 1

Summary

Excerpted from the GeneReview: Lynch Syndrome
Lynch syndrome is characterized by an increased risk for colorectal cancer (CRC) and cancers of the endometrium, ovary, stomach, small bowel, urinary tract, biliary tract, brain (usually glioblastoma), skin (sebaceous adenomas, sebaceous carcinomas, and keratoacanthomas), pancreas, and prostate. Cancer risks and age of onset vary depending on the associated gene. Several other cancer types have been reported to occur in individuals with Lynch syndrome (e.g., breast, sarcomas, adrenocortical carcinoma). However, the data are not sufficient to demonstrate that the risk of developing these cancers is increased in individuals with Lynch syndrome.

Genes See tests for all associated and related genes

  • Also known as: COCA1, FCC1, HNPCC, HNPCC1, LCFS2, LYNCH1, MMRCS2, MSH-2, hMSH2, MSH2
    Summary: mutS homolog 2

  • Also known as: HNPCC3, MLH2, PMSL1, hPMS1, PMS1
    Summary: PMS1 homolog 1, mismatch repair system component

Clinical features

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Suggested reading

Practice guidelines

  • NCCN, 2024
    NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®) Colon Cancer, 2024
  • NICE, 2021
    UK NICE Guideline NG151, Colorectal cancer, 2021
  • NICE, 2020
    UK NICE Diagnostics Guidance DG42, Testing strategies for Lynch syndrome in people with endometrial cancer, 2020
  • ACMG ACT, 2019
    American College of Medical Genetics and Genomics, Genomic Testing (Secondary Findings) ACT Sheet, MLH1, MSH2, MSH6, PMS2, EPCAM Pathogenic Variants, Lynch Syndrome (Hereditary Non-polyposis Colon Cancer [HNPCC]), 2019
  • SGO, 2014
    Society of Gynecologic Oncology (SGO) Clinical Practice Statement: Screening for Lynch Syndrome in Endometrial Cancer
  • ACMG ACT, 2012
    American College of Medical Genetics and Genomics Family History ACT Sheet, Colon Cancer (Asymptomatic), 2012
  • EuroGenetest, 2010
    Clinical utility gene card for: Lynch syndrome (MLH1, MSH2, MSH6, PMS2)

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