Pope Leo XIV has lung cancer: right lung lobe removed

The operation on Tuesday afternoon was meant to remove a small nodule from Pope Leo XIV's lung. By Tuesday evening, the Vatican's medical bulletin carried a heavier message: tests on the lower lobe of his right lung, removed at Rome's Gemelli Hospital, had confirmed lung adenocarcinoma.

As The Hindu noted, the announcement marks the first publicly disclosed major health problem of Leo's 17-month papacy. It also shows an unusual level of openness. The Vatican did not just disclose the surgery; it disclosed the diagnosis, the type of cancer, and the surgical technique.

What the Vatican bulletin actually says

The bulletin, issued by the Holy See Press Office on Tuesday evening, sticks to a tight set of facts. The operation lasted about 90 minutes, while the Pope spent roughly three hours in the operating room. "The surgery was successful, and there were no complications," the statement said.

The team was led by Professor Stefano Margaritora, the chief thoracic surgeon at Gemelli, in a joint statement with the Pope's personal physician, Dr Luigi Carbone. The surgeons said the lobe was removed using a video-assisted technique, adding that the aim was to make the procedure curative.

That last detail matters. Removing the whole lobe, rather than just the nodule inside it, is how surgeons try to eliminate all cancerous tissue in one go. The doctors also confirmed that tissue tests during the operation settled what preoperative tests had suspected: the diagnosis is lung adenocarcinoma.

What the bulletin does not do is look further ahead. There is no word on whether the Pope will need chemotherapy or radiation, no tumor size, and no lymph-node results yet. Those gaps are normal. The final pathology report on the removed lobe takes a few days.

The Pope broke the news himself, two days earlier

Rome learned of the operation the way Leo wanted it to learn: from him, in his own words. At the Sunday noon Angelus on October 11, he told the crowd in St Peter's Square that doctors had found a nodule during routine examinations. "During some recent medical examinations, the doctors found a small, localized nodule in my lung," he said. He added that it had been detected at a very early stage and was well localised, and that he had decided to have it removed on his doctors' advice.

The Pope also told Tokyo's Cardinal Tarcisio Isao Kikuchi that the operation was not urgent, and that he chose to have it early so his travel plans would not change, according to the Associated Press. The Vatican then cancelled all of his audiences through October 20.

On Tuesday, Leo walked into Gemelli Hospital through the main entrance and waved to dozens of well-wishers gathered outside. He had the operation that afternoon. As The Hindu noted, the episode showed a rare level of transparency about the health of a sitting pope, with the pontiff announcing both the problem and its solution before the hospital confirmed either.

What lung adenocarcinoma means

The diagnosis sounds alarming, but the words themselves need some unpacking. Adenocarcinoma is a form of non-small cell lung cancer that begins in glandular cells, the cells that produce substances such as mucus. It is the most common type of lung cancer, accounting for more than 30 per cent of all lung cancers, according to the City of Hope Cancer Treatment Centers of America.

It usually starts in the outer parts of the lung, around the tiny air sacs called alveoli. When a nodule shows up on a scan, it can be harmless or cancerous, and removing it lets pathologists examine the tissue directly. That is what happened on Tuesday.

The critical question now is whether the cancer spread beyond the lung. In lung cancer surgery, surgeons typically remove the lymph nodes that drain the affected lobe, and testing them decides the stage. Stage 1 means no spread to the nodes. "If all those lymph nodes turn out to be negative, so stage one, then the outlook is very good," Dr Lorenzo Spaggiari of the European Institute of Oncology told AP. He is not involved in the Pope's care.

Dr Stephen Liu, a lung cancer expert at Georgetown University, said the missing information is what decides the prognosis. "While we have the diagnosis, we do not yet have the stage. This is critical to prognosis and treatment," he told Reuters. If the cancer is small and the nodes are clear, he said, surgery itself is likely to be curative. A greater extent of involvement would indicate a poorer prognosis.

Confirmed and not yet known

Confirmed	Not yet known
Diagnosis: lung adenocarcinoma	Tumour size
Lower lobe of right lung removed, Oct 13	Lymph-node test results
90-minute operation, no complications	Final pathology report (takes a few days)
Surgeons: Margaritora and Carbone	Whether chemotherapy or radiation is needed
About a week in hospital; audiences cancelled through Oct 20	Whether the Nov 6-17 South America trip goes ahead

India prays for the pontiff

The news travelled fast through India's Catholic communities. In Mumbai, the Archdiocese of Bombay asked individuals and churches to pray for the Pope's swift recovery. Archbishop of Bombay John Rodrigues issued a statement recalling the Pope's own appeal on Sunday: "I thank you for your spiritual closeness and I entrust myself to your prayers." He asked parishioners to remember the pontiff in prayers and in the celebration of the holy eucharist, and urged priests to encourage prayer in communities and homes.

Melwyn Fernandes, secretary of the Mumbai Catholic group Association of Concerned Christians, told the Times of India that the city's Catholic community would pray for the speedy recovery of the Pope and for the medical team, so that Leo could soon resume his ministry.

There was also an Indian face in the crowd at Gemelli itself. On Tuesday evening, as the hospital's chapel overflowed with people, Cardinal Baldassare Reina, the vicar general of the Diocese of Rome, led a rosary for the Pope's healing. Among those praying was Sister Alphonsa Manikkathan from Kerala, along with her fellow sisters of the Daughters of Divine Providence, whose residence sits near the hospital. "We pray for the pope every day, not only today," she told OSV News.

What happens next

The immediate picture is a week of recovery in Rome, with no public engagements before October 20. After that, the calendar raises a harder question. Leo is scheduled to leave for South America on November 6 for an 11-day tour covering Uruguay, Argentina and Peru, which would be the longest overseas trip of his papacy. The Vatican has not said whether the diagnosis changes those plans. Recovery and whatever further treatment the final reports recommend will decide it.

There is some context in the Pope's own past. This is only the second time in his life he has been hospitalised. The first was in 1985, when he contracted typhoid fever shortly after arriving in Chulucanas, Peru, as a young Augustinian missionary. In the biography Pope Leo XIV: The Biography (published 2026, drawn from an interview given in 2025), he called that illness a defining moment that sharpened his focus on his ministry.

Born Robert Prevost in Chicago in 1955, Leo spent decades as a missionary priest and then a bishop in Peru before his election in May 2025. What to watch now: the pathology and lymph-node reports expected over the coming days, his discharge from Gemelli around the end of next week, and the decision on the November South America tour.

📷 Photo: INFOWeather1, Wikimedia Commons (CC BY-SA 4.0).