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News
Mayo Clinic researchers have discovered that fatty liver disease (MASLD) is actually five biologically distinct conditions, each with different risks for liver failure, cancer, and heart disease. Some subtypes are tied to obesity and diabetes, while others are driven by genetics — even in people without typical risk factors. The findings could pave the way for more personalized screening and treatment.
What doctors have long treated as a single condition may actually be five very different diseases. Researchers at Mayo Clinic, publishing in Nature Communications, analyzed genetic and clinical data from over 4,600 patients with metabolic dysfunction-associated steatotic liver disease (MASLD) — formerly known as nonalcoholic fatty liver disease — and identified five biologically distinct subtypes. Some are closely linked to obesity and diabetes, while others appear to be driven by inherited genetic differences, even in patients without the usual metabolic risk factors.
The discovery was made possible by Mayo Clinic's Research Data Atlas, which links patients' genomic data with detailed medical records, including data from the Tapestry Study — Mayo's largest exome dataset with over 100,000 participants. Beyond liver-specific risks, the study also uncovered surprising associations between certain MASLD subtypes and conditions like depression, sleep apnea, and migraines.
Key Takeaways:
Why it matters: MASLD affects nearly 30% of adults worldwide and is a leading driver of cirrhosis, liver cancer, and liver transplantation. Redefining it as five distinct conditions could fundamentally shift how clinicians screen, monitor, and treat patients — moving liver disease care firmly into the era of precision medicine.
