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Pope Leo's Brother Louis Being Treated for Blood Cancer: Sources

Summary by NBC Chicago
VATICAN CITY — OCTOBER 7, 2026: Pope Leo XIV leaves at the end of his weekly general audience at St. Peter’s Square in the Vatican. (Photo by Maria Grazia Picciarella/SOPA Images/LightRocket via Getty Images)

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Louis Prevost, the elder brother of Pope Leo XIV, also fights cancer, said his wife, Deborah Prevost to CBS News. He detailed that for some time he was in remission, but that three months ago he returned to treatment and participated in a clinical trial in Florida.The cancer of the pope's brother is a multiple myeloma, which originates from the plasma cells of the bone marrow. These are responsible for fighting diseases. Louis was diagnosed with…

·Mexico
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Pope Leo XIV has been diagnosed with lung cancer. It is not the first stroke of fate for his family. His brother Louis Prevost has also been fighting the disease for years.

·Berlin, Germany
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VATICAN CITY — OCTOBER 7, 2026: Pope Leo XIV leaves at the end of his weekly general audience at St. Peter’s Square in the Vatican. (Photo by Maria Grazia Picciarella/SOPA Images/LightRocket via Getty Images)

·Chicago, United States
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In the family of Pope Leo XIV (71) there is a sad parallel: the older brother of the Pontifex is like him suffering from cancer. Louis Prevost has a relapse. Louis' wife confirmed to CBS News that he suffers from multiple myeloma – a malignant disease of the bone marrow. The brother of the Pope lives in Florida and is being treated in a hospital. Currently he is taking part in a clinical study. The news about the disease is public at a time when…

The Vatican announced Tuesday that Pope Leo XIV, who had a tumor removed from his lung, is suffering from lung cancer. The ugly disease was discovered during surgery. His eldest brother has been battling the cancer for a long time. It only returned a few months ago…

The older brother of Pope Leo XIV, Louis Prevost, 74, also faces cancer. He is hospitalized in Florida, in the United States, for the treatment of a multiple myeloma, type of cancer that affects cells of the bone marrow. Louis revealed on Wednesday (14) to the American press that received the diagnosis in 2017. The [...] The post Brother of Pope Leo XIV also treats cancer; parents of the pontiff died of the disease appeared first in North Tribun…

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NBC Chicago broke the news in Chicago, United States on Wednesday, October 14, 2026.
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