Breaking News · October 14, 2026, 6:20 AM CDT
As reported by CBS News:
Louis Prevost, Pope Leo XIV's older brother who lives in Florida, has multiple myeloma, his wife told CBS News on Tuesday.
The news comes amid the Vatican's earlier announcement that the pope has been diagnosed with lung cancer after undergoing surgery to remove a nodular lesion from his right lung.
Deborah Prevost did not share what stage Louis' cancer is in but said he's currently in a clinical trial at a local hospital where he's being treated. Multiple myeloma is a type of cancer that affects plasma cells, according to the Multiple Myeloma Research Foundation.
Deborah Prevost said Louis was first diagnosed in 2017 but was able to maintain it at a "very low level" after undergoing treatment in 2019 that included stem cell treatment and a clinical trial. He "fell out of remission" three months ago, she said.[1]
On the record
“We thank God that the surgery on Pope Leo was, by all accounts, successful, and that he continues his recovery and recuperation,” New York City’s Archbishop Ronald Hicks said in a statement.[2]
The numbers in the reporting
How 5 outlets are reporting it
- Pope Leo XIV's brother Louis Prevost also battling cancer, wife tells CBS News (CBS News)
- What to Know About Pope Leo’s Cancer Diagnosis (The New York Times)
- Pope Leo spends a peaceful night in the hospital after cancer surgery (NBC News)
- What to know about pulmonary adenocarcinoma (The Washington Post)
- Pope Leo Diagnosed With Lung Cancer After Surgery (WSJ)
What NBC News reports
Pope Leo XIV spent a calm night in the hospital after successful surgery that saw part of his right lung removed and a confirmed cancer diagnosis, the Vatican said early Wednesday.
It said more information would follow later in the day. The 71-year-old American pontiff was diagnosed with adenocarcinoma, a type of non-small cell lung cancer which accounts for 80% of all cases, according to the American Lung Association.[2]
What the official record says
We searched government, military, court and international-body sites for a statement or document on this story and found none published yet. The officials quoted in this report are quoted as the outlets reported them, so treat those statements as secondhand until the original is published.
How to Verify This Yourself
Each headline above links to that outlet’s own report. The quoted passages come from the first two of those reports that could be retrieved in full.
References
- CBS News. Pope Leo XIV's brother Louis Prevost also battling cancer, wife tells CBS News. ↩
- NBC News. Pope Leo spends a peaceful night in the hospital after cancer surgery. ↩
Investigative methodology: this story was selected because 5 separate news organizations were reporting it at the same time. The quoted text is verbatim from the cited reports; nothing is paraphrased or added. Produced by scripts/breaking_news_monitor.py, not a language model.
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