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Pope Leo XIV and Louis Prevost Face Cancer Diagnoses

Pope Leo XIV underwent lung surgery while Louis Prevost continues treatment for multiple myeloma.

Updated on Oct. 13, 2026 in Cancer

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Pope Leo XIV and Louis Prevost are managing significant cancer diagnoses, with the Pope recovering from lung surgery and Prevost undergoing multiple myeloma treatment. AI Illustration. Upload story photo >

Pope Leo XIV underwent surgery to remove the lower lobe of his right lung after a cancer diagnosis. Simultaneously, Louis Prevost is managing a relapse of multiple myeloma.

Why it matters

These developments highlight the ongoing personal health battles of prominent figures, underscoring the persistence of chronic and acute cancer conditions regardless of status.

Louis Prevost was originally diagnosed with multiple myeloma in 2017 and has since undergone stem cell treatment and a clinical trial. He is now participating in a new clinical trial at a local hospital.

The players

Pope Leo XIV

Pope Leo XIV is the current leader of the Catholic Church and resides in the Vatican.

Louis Prevost

Louis Prevost is a Florida resident who is currently undergoing treatment for multiple myeloma.

The details

Pope Leo XIV received his diagnosis following surgery on Tuesday to remove the lower lobe of his right lung. Louis Prevost, who previously entered remission after 2019 treatments, is currently seeking new therapeutic avenues for his recurring multiple myeloma.

Timeline

  1. Louis Prevost was first diagnosed with cancer in 2017.

  2. Louis Prevost received stem cell treatment and entered a clinical trial in 2019.

  3. Louis Prevost fell out of remission in July 2026.

  4. Pope Leo XIV and Louis Prevost spoke between October 6 and October 12, 2026.

  5. Pope Leo XIV underwent surgery and news regarding both men was shared on October 13, 2026.

Health Landscape

The clinical management of multiple myeloma follows established clinical trial protocols for patients whose disease has progressed. This case highlights how patients navigate shifting options when legacy treatments lose efficacy over time.

These diagnoses highlight the importance of persistent monitoring and the availability of clinical trials for complex cancer cases. Patients dealing with long-term conditions may find these experiences relevant to their own healthcare access and treatment planning.

The takeaway

Maintaining access to clinical trials remains a critical component for patients managing recurring blood cancers. Proactive communication between patients and their medical teams is essential when long-term remissions are interrupted.

Further reading

Learn more about advancements in oncology and current treatment options at the Cancer section.