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GWAS meta-analysis identifies genetic risk loci for female genital tract polyps in womenNew DNA clues link common gynecological issues to endometriosis and cancer risks

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Key Takeaway
Note shared genetic architecture between female genital tract polyps and endometriosis, fibroids, and endometrial cancer.

This study is a genome-wide association study (GWAS) meta-analysis focused on female genital tract polyps. The analysis included 48,400 cases and 477,134 controls drawn from four biobanks. The primary objective was the identification of risk loci for these polyps, while secondary outcomes included candidate genes and causal relationships with endometriosis, fibroids, and endometrial cancer. No specific medications or interventions were evaluated in this genetic analysis.

The main results identified 26 risk loci for female genital tract polyps, of which 12 were previously unreported. Additionally, 193 candidate genes were highlighted. Through multi-trait analysis, 26 additional loci were identified. In an independent cohort replication, 39 loci were confirmed. Mendelian randomization demonstrated bidirectional causal relationships between female genital tract polyps and both endometriosis/fibroids, as well as endometrial cancer.

The authors note shared genetic architecture with other gynaecological disorders. Safety data, including adverse events or tolerability, were not reported as this was a genetic association study rather than a clinical trial. The certainty of these genetic associations is derived from the meta-analysis of biobank data, not from randomized intervention trials.

Many women struggle with conditions like fibroids, endometriosis, or polyps without knowing why they happen. This massive study looked at the DNA of nearly half a million women to find the genetic switches that turn these diseases on. By analyzing data from four major health databases, researchers identified 26 new genetic locations that increase the risk of developing polyps in the female genital tract. They also found 193 specific genes that might be driving these issues.

The research used a method called Mendelian randomization to prove that these conditions are deeply connected. The results showed a two-way street between these disorders and endometriosis or fibroids, meaning they share the same genetic architecture. There was also a link found between these benign growths and endometrial cancer, showing they are related in the same family of diseases.

However, knowing the genetic links is not the same as having a cure. These findings are based on DNA variations present from birth, which helps explain who is at risk, but they do not tell us how to stop the disease. The study did not report any safety issues because it looked at genes, not drugs. This work is a crucial first step toward understanding the root causes, but it does not mean we can predict an individual's future health based on these results yet.

What this means for you:
Shared DNA variations connect common gynecological conditions like fibroids and endometriosis to each other and to cancer risk.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedApr 2026
View Original Abstract ↓
Female genital tract (FGT) polyps are common benign growths affecting up to half of all women. However, they carry malignant potential, and their genetic architecture remains poorly defined. We conducted a genome-wide association study (GWAS) meta-analysis across four biobanks (48,400 cases, 477,134 controls), identifying 26 risk loci for FGT polyps, 12 of which were previously unreported. Integrative gene prioritisation highlighted 193 candidate genes, revealing a potential convergent biological mechanism: where germline variation in DNA replication and maintenance (e.g., PRIM1, TERT and HMGA1) compromises genomic stability in the context of hormone-driven proliferation (e.g., ESR1 and GREB1). This susceptibility is further modulated by metabolic drivers of estrogen biosynthesis, underscored by specific adiposity-related loci (e.g. RSPO3 and PLCE1) and the aromatase gene CYP19A1. Mendelian randomisation demonstrated bidirectional causal relationships with endometriosis and fibroids, and endometrial cancer. Leveraging the shared genetic architecture of FGT polyps and other gynaecological disorders via multi-trait analysis revealed an additional 26 loci, validating sub-threshold regions encompassing HMGA1 and GREB1. In total, 52 risk loci were identified (36 novel), 39 of which replicated in an independent cohort. These findings reframe polyps not merely as local gynaecological overgrowths but as manifestations of a systemic proliferative syndrome characterised by dysregulated genome stability and estrogen signalling, which may also impact malignant transformation.
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