Pope Leo XIV Has Lung Cancer. His November Latin America Tour Is Now in Doubt.

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A Diagnosis Caught Early — and What His Doctors Are Saying

The Vatican confirmed Tuesday that Pope Leo XIV underwent successful surgery to remove the lower lobe of his right lung at Rome's Gemelli Hospital — and that post-surgical biopsies locked in a diagnosis of lung adenocarcinoma, putting the 71-year-old pontiff on a recovery timeline that collides head-on with the most emotionally charged papal trip in years.

For the U.S. Latino Catholic community — and for hundreds of millions of the faithful across South America who have been waiting 17 months for this moment — the diagnosis threatens to postpone what was never simply a diplomatic tour: it was a homecoming.

The Vatican broke with institutional tradition in how it handled the disclosure. Leo surfaced the news himself on Sunday, Oct. 11, from the Apostolic Palace window during the Angelus, describing the nodule as detected "at a very early stage." Surgeons led by Stefano Margaritora, Gemelli's chief thoracic surgeon, then performed the lobectomy using a video-assisted technique — what the Vatican's medical bulletin described as a "radical" resection, a clinical term signaling the intent to clear all suspect tissue in one procedure.

Medical voices outside the Vatican urged measured confidence. Lung adenocarcinoma, while serious, is one of the more treatable forms of the disease when caught at a localized, early stage. Oncologists who reviewed the public details before the operation said the prognosis was "excellent." The Vatican has not yet announced whether additional treatment — chemotherapy, radiation, or targeted therapy — will follow.

Leo's older brother, Louis Prevost, is also currently battling multiple myeloma, a plasma cell cancer. CBS News confirmed the detail Tuesday after Louis's wife, Deborah Prevost, disclosed that he is in a clinical trial for treatment — quietly adding a layer of personal weight to the pontiff's own diagnosis.

Three Nations on Pause: What the November Tour Means

The diagnosis arrived with a hard deadline attached. Leo's November 6–17 apostolic journey to Uruguay, Argentina, and Peru is the longest trip of his papacy — a grueling circuit of a dozen flights, two helicopter transfers, 10 cities, and a physically demanding altitude shift into Peru's Andean highlands. Medical guidelines for lobectomy recovery generally advise patients against air travel for roughly three weeks post-surgery, leaving Leo a razor-thin window before his scheduled Nov. 6 departure.

Cardinal Daniel Sturla of Montevideo told reporters this week that the Church in Uruguay was simply waiting for the Holy See to officially confirm whether the visit remains viable. Argentine President Javier Milei said his nation was praying for the pontiff and that the government stood ready to adjust the scheduled visit if the pope's condition required it. Peru's President Keiko Fujimori offered prayers during a nationally televised Mass at Lima's Shrine of Las Nazarenas — the site of devotion to El Señor de los Milagros, the Lord of Miracles, Peru's most revered religious icon.

Leo had publicly greeted members of the Lord of Miracles Brotherhood at St. Peter's Square on the same Sunday he disclosed his diagnosis — a gesture that carried unmistakable meaning to Peruvian Catholics watching from Lima.

Why This Tour Was Personal — and What It Means to Latinos in the U.S.

For a pope born in Chicago but shaped by nearly two decades of missionary service in Peru — where he contracted typhoid fever in 1985 during his first assignment in Chulucanas, a near-fatal ordeal he later described as a turning point that called him back to the country — the November trip was never administrative. After recovering, Leo returned briefly to the United States before going back to Peru in 1988, this time serving in Trujillo and later in Chiclayo, where he eventually served as bishop and archbishop. He acquired Peruvian citizenship in 2015 and carried those roots into the conclave that elected him. A 2026 Pew Research Center survey found that nearly 79 percent of Peruvian Catholics view him favorably — the highest rating of any nation surveyed in the region.

The resonance reaches deep into U.S. Latino parishes. In South Florida — one of the country's most Catholic and ethnically diverse metro areas — Leo's election in May 2025 triggered immediate celebrations from Miami Shores to Southwest Miami-Dade. Miami Archbishop Thomas Wenski noted that Leo's years among Peru's poor positioned him as a pope shaped by the same values — immigration, social justice, the dignity of the marginalized — that animate Latino Catholic identity in the United States.

That emotional investment is now channeling into prayer. The Augustinian community Leo long served through the Midwest said this week that messages of solidarity had poured in from communities across the country. Chicago-area Catholics, many of whom feel a geographic claim to the first American pope, held vigil near his childhood home in Dolton.

Leo told reporters on Sunday that he intends to make the Latin America journey. As of Wednesday, neither his doctors nor the Vatican had officially said he cannot.

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