Simple renal cysts are associated with a higher risk of ischemic stroke in young adults (18-50 years) but not with greater stroke severity, and thus merit clinical awareness pending confirmation in prospective multicenter cohort studies.
Key Findings
Results
Simple renal cysts were associated with a higher risk of ischemic stroke in young adults aged 18-50 years.
Retrospective case-control study at the Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, covering October 2022 to September 2025.
219 young patients with acute ischemic stroke were compared with 219 age- and sex-matched controls who underwent medical examinations.
Binary logistic regression was used to identify risk factors for ischemic stroke; simple renal cysts remained among the factors associated with higher stroke risk.
The abstract does not report the effect size (odds ratio) or confidence interval.
Results
Elevated blood pressure and elevated blood glucose were also associated with a higher risk of ischemic stroke in young adults.
Patients with elevated blood pressure, elevated blood glucose, and concurrent simple renal cysts had a higher risk of ischemic stroke.
Potential risk factors compared between groups included blood pressure, fasting blood glucose, dyslipidemia, homocysteine, and simple renal cysts.
Binary logistic regression was used to identify risk factors among the 219 cases and 219 controls.
Results
Simple renal cysts did not correlate with greater stroke severity in young patients with ischemic stroke.
The abstract states that simple renal cysts were associated with stroke risk but 'did not correlate with greater stroke severity'.
The severity measure and statistics are not given in the abstract.
Conclusions
The authors conclude that simple renal cysts merit clinical awareness in young adults with ischemic stroke and call for prospective multicenter cohort studies.
Such studies are expected to confirm the association and clarify potential mechanisms.
The study was retrospective and single-center, so causality cannot be inferred from the design.
The study's background notes that incidence of ischemic stroke among young people is increasing and that it is a major cause of death and disability in young adults.
What This Means
This study looked at whether simple kidney cysts, which are fluid-filled sacs that are usually harmless and common, are linked to stroke in young adults. Researchers at a hospital in China compared 219 people aged 18-50 who had a stroke caused by a blocked blood vessel (ischemic stroke) with 219 people of similar age and sex who had routine medical check-ups. They compared factors such as blood pressure, blood sugar, cholesterol and fats, homocysteine, and whether the person had simple kidney cysts.
The analysis found that high blood pressure, high blood sugar, and simple kidney cysts were each linked to a greater likelihood of having a stroke at a young age. Having kidney cysts was not linked to more severe strokes among those who had one.
This research suggests that kidney cysts might be a marker worth noticing in young people at risk of stroke, but it does not show that cysts cause strokes. The study was retrospective and done at one hospital, so the results may not apply everywhere. The authors say larger prospective studies across multiple centers are needed to confirm the link and understand how it might work.
Li F, Zhang Q, He G, Tong Y, Song K. (2026). Simple renal cysts are associated with ischemic stroke in young adults: a case-control study.. Frontiers in neurology. https://doi.org/10.3389/fneur.2026.1926737