Pope Leo's Surgery Confirms Lung Cancer, Vatican Says

*Updated 22:15 UTC, Tuesday: Vatican confirms lung cancer after successful surgery*

Pope Leo's surgery on Tuesday did what doctors hoped, and it confirmed what they feared. In a medical bulletin issued Tuesday evening, the Vatican said surgeons at Rome's Gemelli hospital removed the lower lobe of the pope's right lung in a video-assisted operation, and tissue tests confirmed lung adenocarcinoma, the most common form of lung cancer, just as preoperative tests had indicated.

The operation itself lasted about 90 minutes, with the pope in the operating room for roughly three hours. The surgical team was led by Professor Stefano Margaritora, Gemelli's chief thoracic surgeon. The Vatican said the surgery was successful, with no complications, and that Leo woke up normally and returned to his room on the hospital's tenth floor. He is expected to spend about a week in the hospital recovering.

All of the pope's public events and audiences are canceled through October 20. The Vatican has not said whether his 11-day tour of Uruguay, Argentina and Peru, set to start November 6, will go ahead as planned.

Pope Leo announced on Sunday that he will undergo surgery this week to remove a small nodule found on his lung, the first major health scare of his 18-month papacy. The 71-year-old pontiff told pilgrims gathered in St. Peter's Square after the Angelus prayer that doctors discovered the nodule during recent examinations. He called it a "small, localized nodule in my lung," adding that it "was detected at a very early stage and is circumscribed."

The Vatican press office said the operation will take place at Rome's Gemelli hospital in the first days of the week, with about a week of recovery expected. The announcement was carried by wire services and major outlets including AP, CNN, The Times and NPR.

Why it matters

The manner of the announcement mattered as much as the news. Leo did not let the press office break it. He told the crowd himself, during his regular Sunday blessing, using his own description of the finding. Popes have often treated their health as a private matter until hospitalization was unavoidable; Leo walked into the square and said the word "surgery" out loud.

The surgery creates a week in which the Vatican must function without an active pontiff at the helm. CNN reported that decisions requiring the pope's signature will go on hold while he recovers. The hospitalization also forces the first calendar casualty: the October 14 closing Mass of the Vatican family meeting marking the 10th anniversary of Amoris Laetitia will be canceled.

It is the first health issue of any kind to surface since Leo, the first US-born pope, was elected in May 2025. His public image has been one of unusual physical energy for a man in his seventies: he plays tennis weekly and swims at Castel Gandolfo, the papal summer residence. The nodule announcement breaks that streak of apparent vitality.

There is also the quiet question of precedent. Pope Francis died on April 21, 2025, after a prolonged respiratory crisis, and the machinery of the Holy See had months to adapt to a frail pontiff. Leo's doctors caught this nodule early, but the Vatican now faces the practical problem of running a 1.4-billion-member church while its leader spends a week in a hospital bed.

The context

Leo has no known history of health problems, and the Vatican gave no sign that the examinations that found the nodule were prompted by symptoms. The examinations themselves were described only as recent. The Vatican offered no further detail on what prompted them or when the nodule was first spotted. The press office described the finding as well contained, caught at a very early stage.

For general context, Reuters cited a note from the American Thoracic Society that fewer than 5 percent of lung nodules prove cancerous. That figure describes lung nodules in general, not the pope's case, and the Vatican has said nothing about a diagnosis beyond the early-stage, circumscribed description.

What happens next

Leo is expected to enter Gemelli, Rome's main papal hospital, in the first days of this week. The operation to remove the nodule should be followed by roughly a week of recovery, during which public appearances and signature decisions stay on hold. That timetable puts the canceled October 14 closing Mass squarely inside the first days of his hospital stay.

Bigger dates loom. Leo plans an 11-day South America tour from November 6 to 17, covering Uruguay, Argentina and Peru, the first major foreign trip of his papacy. The Vatican has not said whether the recovery will affect those plans.

Key numbers

• 71: the pope's age
• 1.5 years: the length of his tenure so far
• About 1 week: the expected recovery time
• 11 days: the planned South America tour, Nov 6 to 17, across 3 countries
• May 2025: Leo's election as the first US-born pope
• Under 5 percent: the share of lung nodules that prove cancerous, per the American Thoracic Society (general medical context, not a diagnosis)