Pope Leo XIV's Family Faces Dual Cancer Crisis as Brother Enters Clinical Trial

Key points

• Pope Leo XIV underwent a 90-minute surgery at Rome's Gemelli Hospital to remove a lower lobe of his right lung, diagnosing him with pulmonary adenocarcinoma.
• The Vatican confirmed the operation was successful with no complications, and the Pope is recovering as expected, though public appearances are suspended until October 20.
• Louis Prevost, the Pope's eldest brother, is currently participating in a clinical trial for multiple myeloma in Florida, having recently fallen out of remission after a 2017 diagnosis.
• Deborah Prevost, Louis's wife, stated the family is 'going through a lot' but maintaining high spirits, while Louis confirmed he is receiving CAR-T cell therapy.
• Pope Leo XIV issued his first message since the diagnosis, thanking Catholics for their prayers and acknowledging his absence from recent church events.

Background

This development follows the Vatican's initial announcement of the Pope's lung cancer diagnosis and successful surgery, as covered in our archive on October 14, 2026. The family's history with cancer is notable, as both of the Pope's parents died of the disease in the 1990s.

How outlets are covering it

The BBC and CNN both report on the successful surgery and the Pope's recovery, but the BBC places greater emphasis on the simultaneous cancer diagnosis of his brother, Louis Prevost, and the family's emotional state. CNN focuses more on the Pope's first public message and the medical details of his recovery, noting that he is not a smoker but has a family history of cancer. Both outlets agree that the Pope's prognosis depends on the stage of the cancer, which the Vatican has not disclosed.

Why it matters

The simultaneous cancer diagnoses of the Pope and his brother highlight the personal toll of the disease on the head of the Catholic Church and raise questions about the Pope's ability to fulfill his duties, including a planned trip to South America. The family's history with cancer also underscores the genetic and environmental factors that may contribute to such diagnoses.

What to watch

The Pope is expected to remain in the hospital for a week, and his public appearances are suspended until October 20. The Vatican has not disclosed the stage of his cancer or future treatment plans. Louis Prevost will continue his clinical trial in Florida, and the family will continue to support both brothers through their respective treatments.