PMS2 rs1064793868: Understanding This Genetic Variant
The rs1064793868 variant is a specific genetic change located within the PMS2 gene. This gene is essential for DNA repair, and variants in this region are studied for their potential association with Lynch syndrome, a condition that increases the risk of certain cancers.
What each genotype means
Typical PMS2 genotype
This is the most common genotype observed in the general population. It indicates that you do not carry the specific variant rs1064793868, which is associated with the PMS2 gene. This result does not suggest an increased genetic predisposition to Lynch syndrome related to this specific marker.
This is the most common genotype found across all major global populations.
Variant carrier status
You carry one copy of the rs1064793868 variant. While the PMS2 gene is associated with Lynch syndrome, the clinical significance of this specific variant is currently limited in public databases. You should discuss this finding with a genetic counselor or healthcare provider to understand if it has any relevance to your personal or family health history.
This genotype is rare and is not commonly observed in the general population.
Variant carrier status
You carry two copies of the rs1064793868 variant. Because PMS2 variants can be associated with hereditary cancer predisposition, it is important to consult with a medical professional or genetic counselor to interpret this result in the context of your overall health. They can help determine if further clinical evaluation or screening is appropriate for you.
This genotype is extremely rare in the general population.
What is the rs1064793868 Variant?
The rs1064793868 variant is a single nucleotide polymorphism (SNP) located on chromosome 7 within the PMS2 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is cataloged in public databases like dbSNP, which track genetic variations across human populations. Because the PMS2 gene is complex and contains multiple pseudogenes—non-functional segments of DNA that resemble the actual gene—identifying and interpreting specific variants like rs1064793868 requires specialized laboratory techniques. Researchers study these variants to understand how they might influence the function of the protein encoded by the gene. While some variants have clear, well-documented effects on health, others are classified as variants of uncertain significance, meaning more research is needed to determine their exact impact on biological processes.
The Role of the PMS2 Gene
The PMS2 gene provides instructions for making a protein that plays a critical role in the mismatch repair (MMR) system. This system acts like a biological spell-checker, identifying and fixing errors that occur when DNA is copied during cell division. When the MMR system functions correctly, it prevents the accumulation of mutations that could lead to uncontrolled cell growth. If the PMS2 protein is not functioning properly due to a pathogenic variant, these DNA errors may persist, leading to a condition known as microsatellite instability. This instability is a hallmark of Lynch syndrome, an inherited disorder that increases the risk of developing colorectal, endometrial, and other cancers. Because the PMS2 gene is part of a larger family of MMR genes, including MLH1, MSH2, and MSH6, its proper function is vital for maintaining genomic stability throughout a person's life.
Research and Clinical Associations
Research into PMS2 variants is ongoing, particularly regarding their role in Lynch syndrome. While pathogenic variants in PMS2 are known to cause Lynch syndrome, the penetrance—the likelihood that a person with a variant will actually develop the associated condition—is often observed to be lower for PMS2 compared to other MMR genes. This means that even if an individual carries a variant, the risk of developing cancer may vary significantly based on other genetic and environmental factors. Current scientific literature emphasizes that while PMS2 mutations contribute to cancer risk, the clinical interpretation of specific variants remains a complex task. Clinicians and genetic counselors use this information to guide screening and surveillance strategies. It is important to note that the presence of a variant does not guarantee the development of disease, and research continues to refine our understanding of how these specific genetic changes influence individual health outcomes.
Population Frequency and Interpretation
The rs1064793868 variant is considered rare in the general population. Genetic databases like gnomAD provide data on how frequently specific alleles appear across different ancestral groups, which helps researchers determine if a variant is common or rare. When a variant is rare, it is often more difficult to study because fewer individuals carry it, limiting the amount of data available to draw definitive conclusions about its health impact. Because this variant is rare, it is not typically found in the majority of the population. If you have received information about this variant from a genetic test, it is essential to discuss the results with a healthcare professional or a certified genetic counselor. They can provide context based on your personal and family medical history, helping you understand what the information means for your health and whether any specific clinical follow-up is appropriate.
What You Can Do With This Information
Genetic information is a tool for understanding your biological makeup, but it should always be interpreted within the context of your overall health. If you have questions about the rs1064793868 variant, the most effective step is to consult with a medical professional, such as a genetic counselor or a physician specializing in hereditary conditions. They can help you distinguish between findings that require clinical action and those that are currently considered neutral or of uncertain significance. You cannot diagnose yourself or determine your future health risks based on a single variant alone. Avoid making medical decisions, such as changing medications or altering screening schedules, without professional guidance. Genetic testing results are complex, and a qualified expert can help you navigate the implications, ensuring that any decisions regarding your health are based on accurate, personalized, and evidence-based information.
How common is this variant?
The rs1064793868 variant is documented as a rare variant in the general population.
Frequently asked questions
What is Lynch syndrome?
Lynch syndrome is an inherited condition that increases the risk of developing certain types of cancer, most notably colorectal and endometrial cancer. It is caused by pathogenic variants in genes involved in the DNA mismatch repair system, such as PMS2.
Does having a PMS2 variant mean I will get cancer?
Not necessarily. While certain pathogenic variants in PMS2 are associated with an increased risk of cancer, this does not mean that a person will definitely develop the disease. Many factors, including other genetic influences and lifestyle, play a role in cancer risk.
How can I find out if I have this variant?
This variant is typically identified through clinical genetic testing, often ordered by a doctor or genetic counselor. If you have already had testing, your report should specify if this variant was detected.
What should I do if my report mentions this variant?
If your genetic report mentions this variant, you should schedule an appointment with a genetic counselor or your primary care physician. They can explain the significance of the finding in the context of your personal and family health history.
Is PMS2 testing standard for everyone?
No, genetic testing for PMS2 is usually recommended for individuals with a personal or family history suggestive of Lynch syndrome. It is not a routine test for the general population.
Sources & further reading
Educational information only, last refreshed 10/14/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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