Is Colorectal Cancer Genetic?
Colorectal cancer starts in the colon or rectum and is the third most common cancer worldwide. It often begins as noncancerous polyps that can develop into cancer over time.
Affects ~1 in 23 people in their lifetime.
Genetic Factors Behind Colorectal Cancer
Research has identified multiple genetic variants that influence a person's susceptibility to Colorectal Cancer. While no single gene determines whether someone will develop this condition, specific variants can increase or decrease risk. Key genes studied in relation to Colorectal Cancer include:
SMAD78q24BMP4CDH1SMAD7SMAD7 has been associated with colorectal cancer in genetic studies; as with most common variants, its individual effect is modest and works alongside many other genetic and non-genetic factors.
8q248q24 has been associated with colorectal cancer in genetic studies; as with most common variants, its individual effect is modest and works alongside many other genetic and non-genetic factors.
BMP4BMP4 has been associated with colorectal cancer in genetic studies; as with most common variants, its individual effect is modest and works alongside many other genetic and non-genetic factors.
CDH1CDH1 has been associated with colorectal cancer in genetic studies; as with most common variants, its individual effect is modest and works alongside many other genetic and non-genetic factors.
How GenomeInsight Analyzes Your Risk
GenomeInsight examines your raw DNA data from services like 23andMe, AncestryDNA, or whole-genome sequencing (VCF files) to identify genetic variants associated with Colorectal Cancer. The analysis is performed entirely in your browser, meaning your genetic data never leaves your device.
For each relevant variant, GenomeInsight reports your genotype, the associated risk allele, the odds ratio from published research, and your overall risk profile compared to the general population. Results are presented with easy-to-understand risk visualizations and percentile rankings.
Genetic risk is only one piece of the puzzle. Lifestyle, diet, environment, and family history all contribute to overall risk. GenomeInsight's analysis is for informational and educational purposes and is not a medical diagnosis.
Understanding Your Colorectal Cancer Results
After uploading your DNA file, you will receive a detailed health risk report covering 52 conditions, including Colorectal Cancer. For each condition, GenomeInsight analyzes multiple SNPs (single nucleotide polymorphisms) and calculates a combined risk assessment.
Your results will show whether you carry risk-increasing or protective alleles in genes like SMAD7, 8q24, BMP4, and CDH1. Risk levels range from "Below Average" to "Significantly Increased," with population percentile comparisons to contextualize your results.
Frequently Asked Questions About Colorectal Cancer
Which genes are linked to Colorectal Cancer?
Colorectal Cancer has been associated with SMAD7, 8q24, BMP4, CDH1 in genome-wide association studies. No single variant causes the condition — genetic susceptibility is the sum of many small effects.
If I carry risk variants, will I develop Colorectal Cancer?
Carrying risk alleles raises probability, not certainty. Most common conditions arise from genes interacting with lifestyle and environment over decades, so a higher genetic risk score is best used as motivation for the relevant screening and prevention measures, not as a prediction.
What DNA data do I need for this analysis?
Any standard consumer-genetics raw file (23andMe, AncestryDNA, MyHeritage, FamilyTreeDNA, or VCF from sequencing) contains the relevant variants. Analysis runs locally on your device, so your genetic data stays private.
Related Conditions That Share These Genes
Variants in the same genes often influence more than one condition. These conditions overlap genetically with Colorectal Cancer:
Sources & Further Reading
The risk associations described on this page come from published genome-wide association studies and curated public genomic databases. Explore the primary sources for each gene:
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See how your genetics relate to Colorectal Cancer - upload your data for a personalized analysis.
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Discover Your Colorectal Cancer Risk Profile
Upload your 23andMe, AncestryDNA, or VCF file for a free, privacy-first genetic analysis covering Colorectal Cancer and 51 other health conditions.
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