BRCA1 rs80356600: Understanding Hereditary Cancer Risk Variants
The rs80356600 variant is a recognized pathogenic alteration within the BRCA1 gene. It is clinically associated with an increased risk of developing hereditary breast and ovarian cancer syndromes.
What each genotype means
Typical BRCA1 genotype
This genotype represents the absence of the specific pathogenic variant rs80356600. Individuals with this genotype do not carry this particular hereditary risk factor associated with BRCA1-related cancer susceptibility.
This is the most common genotype found in the general population across all ancestries.
Increased cancer risk carrier
This genotype indicates the presence of one copy of the pathogenic rs80356600 variant. Carriers of this variant have a well-established increased lifetime risk for hereditary breast and ovarian cancer, as it disrupts normal BRCA1 tumor suppressor function. Please consult with a genetic counselor or healthcare provider to discuss appropriate cancer screening and risk management strategies.
This genotype is rare and observed at very low frequencies in global population databases.
High cancer risk carrier
This genotype indicates the presence of two copies of the pathogenic rs80356600 variant. This status is associated with a significantly increased risk of hereditary breast and ovarian cancer due to the loss of functional BRCA1 protein. It is essential to discuss this result with a medical professional or genetic specialist to coordinate comprehensive clinical management.
This genotype is extremely rare in the general population.
What is rs80356600?
The identifier rs80356600 refers to a specific genetic variant located within the BRCA1 gene. In genomics, an rsID (reference SNP cluster ID) is a unique label assigned by the dbSNP database to help researchers track specific locations in the human genome. This particular variant is classified as pathogenic, meaning that clinical evidence has linked it to an increased susceptibility to certain hereditary conditions. It is important to understand that genetic variants are simply differences in the DNA sequence compared to a reference genome. While some variants have no impact on health, others, like rs80356600, are categorized based on their potential to disrupt normal biological processes. This variant is specifically studied in the context of hereditary cancer predisposition, where it serves as a marker for clinical evaluation.
The Role of the BRCA1 Gene
The BRCA1 gene, which stands for Breast Cancer gene 1, provides instructions for making a protein that acts as a tumor suppressor. This protein is essential for repairing damaged DNA, which helps maintain the stability of a cell's genetic information. When the BRCA1 gene functions correctly, it helps prevent cells from growing and dividing too rapidly or in an uncontrolled way. However, when a pathogenic variant is present, the production or function of the BRCA1 protein may be impaired. This reduction in DNA repair capacity can lead to the accumulation of further genetic mutations, which may increase the likelihood of cancer development. Because of its critical role in maintaining genomic integrity, variants in BRCA1 are among the most well-studied markers in hereditary cancer research.
Research and Clinical Evidence
The association between pathogenic BRCA1 variants and cancer risk is supported by extensive clinical research. Studies have consistently shown that individuals who inherit a pathogenic variant in BRCA1 have a significantly higher lifetime risk of developing breast and ovarian cancers compared to the general population. The evidence for rs80356600 is derived from clinical databases like ClinVar, which aggregate reports from diagnostic laboratories and researchers worldwide. These databases categorize variants based on the strength of evidence linking them to specific health outcomes. Because this variant is classified as pathogenic, it is considered a high-attention marker in clinical genetics. Researchers continue to study how such variants influence cancer risk, as well as how other genetic and non-genetic factors might modify these risks in different individuals.
Interpreting Your Genetic Information
If you encounter information regarding the rs80356600 variant, it is vital to understand that this is a complex medical topic. Genetic testing results should always be interpreted by a qualified healthcare professional, such as a genetic counselor or a medical geneticist. These experts can help place the information in the context of your personal and family medical history. It is important to note that having a pathogenic variant does not mean a cancer diagnosis is inevitable; rather, it indicates a higher statistical risk that may warrant personalized screening or management strategies. You should never use genetic data to make independent medical decisions. Always discuss your results and any concerns about cancer risk with your clinician, who can provide guidance based on current clinical guidelines and your specific health profile.
How common is this variant?
The rs80356600 variant is considered rare in the general population. Its frequency can vary significantly across different ancestral groups, and it is primarily identified through clinical testing in families with a history of hereditary cancer.
Frequently asked questions
What does it mean if a variant is pathogenic?
A pathogenic variant is a genetic change that has been scientifically shown to increase the risk of developing a specific disease or condition. In the context of BRCA1, it means the variant is associated with a higher likelihood of hereditary breast and ovarian cancer.
Does having a BRCA1 variant guarantee I will get cancer?
No, having a pathogenic BRCA1 variant does not guarantee that you will develop cancer. It indicates an increased statistical risk, but many other factors, including lifestyle, environment, and other genetic modifiers, play a role in cancer development.
Should I get tested for rs80356600?
Genetic testing is typically recommended for individuals with a strong personal or family history of breast or ovarian cancer. You should discuss the appropriateness of testing with a genetic counselor or your doctor to determine if it is right for your situation.
Where can I find more information about BRCA1 variants?
Reliable information can be found through resources like MedlinePlus Genetics, the National Cancer Institute, and ClinVar. These sites provide evidence-based summaries of how specific genes and variants relate to human health.
Sources & further reading
Educational information only, last refreshed 10/4/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs80356600?
Upload a raw DNA file from 23andMe, AncestryDNA, MyHeritage, or FamilyTreeDNA and see this variant — plus thousands more — interpreted in your full report.
Get my report — $29Related variants in BRCA1
This rare variant has been recently annotated in clinical databases as a potential contributor to hereditary breast and ovarian cancer risk.
Variant identified in polygenic risk scores for breast cancer susceptibility.
This variant is a rare genetic alteration in the BRCA1 gene, which is critical for DNA repair and associated with hereditary breast and ovarian cancer syndromes impacting reproductive health.
A very rare variant identified in recent genomic studies, currently being investigated for potential associations with reproductive phenotypes.
A rare variant located in the BRCA1 gene, relevant to reproductive genetic counseling and the assessment of hereditary cancer risk.
This BRCA1 variant (p.Pro871Leu) is a common polymorphism often evaluated in breast cancer risk studies, though it is generally considered to have no clinical significance for hereditary breast and ovarian cancer syndrome.