Pope Leo, who ascended to the papacy 17 months ago, has been diagnosed with lung cancer, according to a statement from the Vatican. The cancer was discovered in the right lung during surgery to remove a mass, which took place on Tuesday. Despite the diagnosis, the Vatican has assured that Pope Leo is currently not in critical condition.
Cancer Diagnosis and Medical Details
Following surgery to remove part of his right lung, it was confirmed that Pope Leo has adenocarcinoma, a common form of lung cancer. The 71-year-old pope came into the role after the death of Pope Francis in May 2025. Prior to the surgery, Pope Leo had been hospitalized after doctors detected a lump in his lung.
Medical experts say the type of cancer found in Pope Leo is not usually considered highly dangerous if caught early. Dr. Stephen Liu, head of Hematology-Oncology at Georgetown University Hospital, told Reuters that if the cancer is small and has not spread to lymph nodes, surgical removal can be curative.
However, Dr. Liu cautioned that a more extensive spread discovered in final analysis would indicate a worse prognosis. The Vatican has not provided detailed information about the extent of the pope’s illness in their medical bulletins, keeping specifics limited.
Impact on Vatican Activities and Schedule
In response to the diagnosis, the Vatican announced that Pope Leo may remain hospitalized until October 20 to undergo treatment and recovery. Consequently, all of his public engagements and events have been canceled through that date, prioritizing his health and rest.
The Vatican’s procedures state that no interim successor can be appointed when the pope is ill. During such periods, all official decisions or actions typically related to the pope are postponed until he is able to resume duties. Nevertheless, daily operations within the Vatican administration continue uninterrupted.
As the highest earthly authority for over 1.4 million Catholics globally, Pope Leo’s health is closely watched by believers worldwide. While this diagnosis creates uncertainty, the Vatican affirms that the pope is stable and receiving appropriate care.
The coming weeks will be crucial in monitoring Pope Leo’s response to treatment for lung adenocarcinoma. His recovery will determine when he can safely return to his responsibilities as the spiritual leader of the Catholic Church.
