Pope Leo XIV's brother Louis Prevost also battling cancer, wife tells CBS News

October 13, 2026 / 6:46 PM EDT / CBS News

Pope Leo XIV's brother Louis Prevost also battling cancer, wife tells CBS News

TL;DR

  • Louis Prevost, Pope Leo XIV's older brother, has been diagnosed with multiple myeloma.
  • His wife confirmed his ongoing treatment in a clinical trial.
  • Louis Prevost was first diagnosed in 2017 but relapsed three months ago.
  • Pope Leo XIV was recently diagnosed with lung adenocarcinoma after surgery.
  • The Vatican has not disclosed the stage or spread of the Pope's cancer.
  • The family remains hopeful and is praying for both Louis and the Pope.