Mayo Clinic Test Changes Care for Half of Lung Patients

For years, patients with pulmonary fibrosis have struggled to get clear answers about why their lungs are scarring and what treatment might actually work. Now Mayo Clinic researchers have found a testing approach that's changing care for more than half of patients.

The study looked at 66 people with fibrotic lung disease and measured their telomeres, the protective caps on chromosomes that naturally shorten with age. In some people, these caps become dangerously short due to inherited conditions, leading to progressive lung scarring that makes breathing increasingly difficult.

When doctors paired telomere measurement with genetic testing, they discovered nearly 1 in 5 patients had a disease-causing genetic variant that explained their condition. More importantly, these insights led to real changes in how patients were treated.

"These diseases are often difficult to diagnose, and patients may be treated based on incomplete or unclear underlying causes," says Dr. Kathryn del Valle, a Mayo Clinic pulmonologist who led the study published in Mayo Clinic Proceedings.

The testing revealed information that helped doctors make better decisions about medications, avoid treatments that could be harmful, and identify patients who needed earlier consideration for lung transplant. In some cases, the results completely redirected the course of care.

The Ripple Effect

The benefits extend far beyond individual patients. When doctors identify a genetic cause, they can flag family members who might be at risk, opening doors to earlier screening and prevention.

Dr. Eva Carmona, senior author of the study, says the approach offers "a practical, scalable way to incorporate genetic and telomere assessment into clinical care." Mayo Clinic is already planning to expand the model with a new Familial Pulmonary Fibrosis Clinic.

The clinic will coordinate genetic testing, counseling, and comprehensive care for both patients and their at-risk relatives. For families who've watched loved ones struggle with mysterious lung disease, having answers and a path forward represents genuine hope.

This research shows how precision medicine can move from theory to practice, giving doctors the tools to understand why disease happens rather than just treating symptoms.