BRCA1 rs8034191: Understanding This Pathogenic Variant
The rs8034191 variant is a recognized pathogenic mutation located within the BRCA1 gene. It is associated with an increased lifetime risk of developing certain hereditary cancers, including breast and ovarian cancer.
What each genotype means
Typical BRCA1 risk profile
This genotype represents the common, non-mutated sequence for this specific location in the BRCA1 gene. It is not associated with the increased hereditary cancer risks linked to the pathogenic variant. You should follow standard population-based cancer screening guidelines recommended by your healthcare provider.
This is the most common genotype found in the general population.
Increased hereditary cancer risk
This genotype includes one copy of the pathogenic variant, also known as c.5266dupC or 5382insC. This variant causes a frameshift that leads to a loss of function in the BRCA1 protein, which is significantly associated with an increased lifetime risk of developing breast, ovarian, and other related cancers. Please consult with a genetic counselor or your physician to discuss appropriate clinical management and risk-reduction strategies.
This is a rare variant, identified in approximately 1 in 6,000 individuals in large population databases.
High-risk pathogenic genotype
This genotype indicates that both copies of the BRCA1 gene carry this pathogenic mutation. Research suggests that complete loss of BRCA1 function is typically embryonic lethal in models, and homozygous or compound heterozygous carriers of such pathogenic variants are rarely observed in clinical settings. If this result is accurate, it requires immediate discussion with a medical geneticist or specialist.
This genotype is extremely rare and has not been observed in large-scale population control cohorts.
What is rs8034191 and Where is it Located?
The rs8034191 variant is a specific genetic alteration found within the BRCA1 gene. In genetics, an rsID (reference SNP cluster ID) is a unique label used by researchers to identify a specific location in the human genome. This variant represents a change in the DNA sequence that can disrupt the normal function of the BRCA1 protein. Because the BRCA1 gene is located on chromosome 17, any variant within this region is carefully studied for its potential impact on cellular health. When a variant is classified as pathogenic, it means that scientific evidence has linked this specific change to an increased likelihood of developing certain health conditions. Understanding the location of this variant helps clinicians and researchers track how it is inherited within families and how it contributes to the overall risk profile of an individual.
The Role of the BRCA1 Gene
The BRCA1 gene plays a critical role in maintaining the stability of a cell's genetic information. It acts as a tumor suppressor gene, which means it produces proteins that help repair damaged DNA and ensure that cells divide in an orderly fashion. When DNA is damaged, the BRCA1 protein helps coordinate the repair process, preventing the accumulation of mutations that could lead to uncontrolled cell growth. If the BRCA1 gene contains a pathogenic variant, the resulting protein may be non-functional or absent, leaving the cell less capable of repairing its DNA. This loss of function is a primary reason why individuals with certain BRCA1 mutations have a higher susceptibility to developing specific types of cancer. Essentially, the gene serves as a guardian of the genome, and its proper function is vital for preventing the development of malignancies.
Research and Clinical Associations
Scientific research has established a strong association between pathogenic variants in the BRCA1 gene and Hereditary Breast and Ovarian Cancer (HBOC) syndrome. Individuals who carry these variants have a significantly higher lifetime risk of developing breast, ovarian, and fallopian tube cancers compared to the general population. Furthermore, research indicates that these risks are not limited to women; men who carry BRCA1 pathogenic variants also face an increased risk for prostate, pancreatic, and male breast cancers. The evidence for the pathogenicity of variants like rs8034191 is derived from extensive clinical studies and data repositories that track genetic findings in patients with family histories of cancer. It is important to note that having this variant does not guarantee that an individual will develop cancer; rather, it indicates a predisposition that may warrant increased clinical surveillance and personalized health management strategies.
Population Frequency and Inheritance
The rs8034191 variant is considered rare in the general population. Genetic variants that significantly increase cancer risk are typically not common because they are often subject to selective pressure. Inheritance of such variants follows an autosomal dominant pattern, meaning that an individual only needs to inherit the variant from one parent to have an increased risk. Because it is hereditary, the variant can be passed down through generations, which is why family history is a key component of genetic risk assessment. While the variant itself is rare, its impact on those who carry it is profound. Genetic testing is the only way to confirm the presence of this specific variant. If you are concerned about your family history or potential genetic risks, it is recommended to consult with a certified genetic counselor who can provide context based on your specific ancestry and clinical background.
Managing Genetic Information
Information about genetic variants like rs8034191 is intended for educational purposes and should not be used for self-diagnosis. If you have received results indicating the presence of this variant, it is essential to discuss these findings with a healthcare professional, such as a genetic counselor or an oncologist. They can help interpret what this means for your personal health and provide guidance on appropriate screening or risk-reduction strategies. You cannot change your genetic code, but you can use this information to make informed decisions about your medical care. Always rely on clinical testing performed in certified laboratories rather than direct-to-consumer reports for medical decision-making. By working with a medical team, you can develop a proactive health plan that addresses your specific risk profile, ensuring that you receive the most accurate and personalized care available.
How common is this variant?
The rs8034191 variant is rare in the general population, with its frequency varying across different ancestral groups.
Frequently asked questions
Does having the rs8034191 variant mean I will get cancer?
No, having this variant does not mean you will definitely develop cancer. It indicates an increased risk, meaning you are more likely to develop certain cancers compared to someone without the variant.
How can I find out if I have this BRCA1 variant?
The only way to confirm the presence of this variant is through clinical genetic testing. You should speak with a doctor or a genetic counselor to discuss whether testing is appropriate for you based on your family history.
What should I do if I test positive for a BRCA1 mutation?
If you test positive, you should consult with a healthcare provider or genetic counselor. They will help you understand your specific risks and discuss options for increased cancer screening or risk-management strategies.
Are men at risk if they carry a BRCA1 mutation?
Yes, men who carry a BRCA1 mutation are at an increased risk for several types of cancer, including prostate, pancreatic, and male breast cancer. It is important for both men and women to be aware of their genetic status.
Sources & further reading
Educational information only, last refreshed 9/21/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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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.