Researchers recently discovered a fascinating connection between endometriosis and liver disease. A new retrospective study suggests that severe endometriosis may actually lower the risk of developing steatotic liver disease (SLD). This finding challenges some previous assumptions about the relationship between metabolic syndrome and gynecological health. While endometriosis often correlates with metabolic concerns, this specific crosstalk reveals a unique protective mechanism within the body.

The Role of Estrogen in Endometriosis and Liver Disease

In this study, clinicians analyzed 455 women who underwent surgery for endometriosis. The research team used abdominal computed tomography (CT) scans to assess liver fat via the liver-to-spleen Hounsfield unit (LS) ratio. Notably, patients with stage 4 severe endometriosis showed a significantly lower prevalence of SLD at 48.3% compared to 62.3% in non-severe cases. Interestingly, this difference likely stems from the high levels of estradiol found in patients with severe disease. Because estrogen naturally helps regulate lipid metabolism, it prevents excessive fat accumulation in the liver. Consequently, the hormonal environment of severe endometriosis seems to provide a metabolic advantage regarding hepatic health.

Implications for Clinical Practice

Furthermore, the multivariate analysis confirmed that severe endometriosis remains an independent factor for reduced SLD risk. This association holds true regardless of the patient's age or existing metabolic comorbidities. Understanding this hepatic-reproductive crosstalk helps doctors better manage the long-term health of women with these conditions. Therefore, physicians should consider hormonal status when they evaluate liver health in reproductive-aged women. Moreover, future studies may further clarify how these estrogen-linked pathways influence other metabolic markers. In contrast to milder stages, the systemic hormonal surge in severe cases appears to mediate this unexpected protection.

FAQs

Why does severe endometriosis relate to lower liver fat?

Severe endometriosis is an estrogen-dependent condition. High levels of circulating estradiol in these patients appear to protect the liver from fat accumulation, thereby reducing the risk of steatotic liver disease.

How was hepatic steatosis measured in this study?

The researchers used the liver-to-spleen Hounsfield unit (LS) ratio on abdominal CT scans. Lower LS values indicate higher hepatic fat levels, while higher values signify a healthier liver profile.

Does this mean endometriosis is metabolicly beneficial?

No, endometriosis is associated with various painful symptoms and infertility. However, this specific study highlights a unique hormonal crosstalk where high estrogen levels in severe cases may mitigate liver fat accumulation.

Disclaimer: This content is for informational and educational purposes only and does not constitute medical advice. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Refer to the latest local and national guidelines for clinical practice.

References

Park JH et al. Surgically confirmed severe endometriosis is associated with lower risk of steatotic liver disease: Evidence of estrogen-linked hepatic-reproductive crosstalk. Int J Gynaecol Obstet. 2026 Jun 06. doi: 10.1002/ijgo.71107. PMID: 42249739.

Suzuki A et al. Hepatic estrogen transcriptional activity and estrogen receptor a gene expression are negatively correlated with fibrosis stage in patients with nonalcoholic fatty liver disease (NAFLD). Hepatology. 2016 Oct; 64(S1): 105A.

Dhruve R et al. Burden of steatotic liver disease in postmenopausal women: NHANES 2017–2020 insights. Termedia. 2025 Apr 28.