rs193922376

A SNP in the MSH2 gene on chromosome 2. Its most notable genotype is A;T: Lynch syndrome, pathogenic mutation

Gene
MSH2
Location
Chr 247,414,421 (GRCh38)
Highest magnitude
6.0Very important
Tested on
AncestryDNA

Genotypes

As shown in 23andMe and AncestryDNA files.

  1. A;AGoodcommon in clinvarTypical · 0.0
  2. A;TMost notableBadLynch syndrome, pathogenic mutationVery important · 6.0

On SNPedia: (A;A), (A;T). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.

Conditions, medicines and genes

Notes

From SNPedia

Show notes, about 220 words

rs193922376, also known as c.942+3A>T and c.943+3A>T, is a rare mutation in the MSH2 gene on chromosome 2. Acting in an autosomal dominant manner, the rs193922376(T) allele is considered pathogenic by multiple sources in ClinVar for Lynch syndrome, a disorder characterized by increased risk for colon cancer and other cancers. Although still exceedingly rare, this mutation has been cited as perhaps the most common Lynch syndrome mutation. See also OMIM 609309.0011 A private name, i5008753, is used by 23andMe for this SNP instead of it's real (public) name. [Microbiological study of a saline soil, El Salitre]. Altered expression of hMSH2 and hMLH1 in tumors with microsatellite instability and genetic alterations in mismatch repair genes. Hereditary nonpolyposis colorectal cancer families not complying with the Amsterdam criteria show extremely low frequency of mismatch-repair-gene mutations. Mutational germline analysis of hMSH2 and hMLH1 genes in early onset colorectal cancer patients. Molecular analysis of hereditary nonpolyposis colorectal cancer in the United States: high mutation detection rate among clinically selected families and characterization of an American founder genomic deletion of the MSH2 gene. The frequency of Muir-Torre syndrome among Lynch syndrome families.

Source and license

Adapted from rs193922376 on SNPedia, using a snapshot taken October 16, 2026. SNPedia content is shared under CC BY-NC-SA 3.0 US, and this page is shared under the same license.

SNPedia is a community-edited wiki. Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice. Magnitude is a community rating of how interesting a genotype is, not a risk score.