Pope Leo's Lung Cancer Diagnosis Alters Vatican Outlook

The diagnosis of lung cancer in Pope Leo XIV has changed the internal dynamic of the Vatican, according to its foreign minister. Although the 71-year-old pope is recovering from surgery and will proceed with a major trip to Latin America next week, Archbishop Paul Richard Gallagher stated that the illness serves as a reality check for the institution and the man leading it.

Gallagher noted that there was a temptation to view Leo as a superhuman figure after his election in 2025. This perception stemmed from the lengthy illness and death of his predecessor, Pope Francis. Gallagher explained that Leo's diagnosis with adenocarcinoma, the most common form of lung cancer, reminds observers that the pope is a mortal like anyone else. He described this realization as a factor that will likely change how Leo is perceived by the public and how he views his own role.

The pope underwent surgery on October 13 to remove the lower lobe of his right lung. Medical tests following the procedure indicated that no further treatment is required. Leo has since resumed his daily activities. The Vatican confirmed this week that he will keep his scheduled travel dates from November 6 to 17 in Uruguay, Argentina, and Peru. The itinerary involves a dozen flights and two helicopter rides, covering a total distance of 19,000 miles.

This journey is the longest of Leo's pontificate. When asked why the trip was not postponed to allow for more recovery time, Gallagher said the pope simply wanted to go. Leo spent two decades as a missionary in Peru, where he holds citizenship, and maintains a close attachment to the country's people and his former diocese of Chiclayo. Gallagher added that clinical advice is very positive, leading Leo to feel confident in undertaking the travel.

Gallagher also discussed future plans for the pope. He predicted that Leo will visit the United States in the near future, though the timing may be influenced by the U.S. midterm elections next month. The Vatican generally avoids papal visits to countries during election campaigns to prevent the appearance of political endorsement. Preliminary discussions have considered aligning a U.S. visit with the U.N. General Assembly or a stop in Mexico. Gallagher said Leo is keen to visit the shrine of Our Lady of Guadalupe in Mexico City. Other confirmed events include a trip to South Korea for World Youth Day in August 2027 and a visit to Australia in 2028 to close the International Eucharistic Congress in Sydney.

Gallagher described Leo as a pensive and focused leader who is not impetuous. The pope, a mathematics major, is well-informed and often already knows the details Gallagher presents during their weekly briefings. Gallagher revealed that he did not know about the surgery until Leo announced it on October 11. He said the pope keeps his long-term plans close, preferring to stick to his current agenda and address issues as they arise. Gallagher rejected the idea that the Vatican bureaucracy would hinder Leo's work, stating that the pope has the appetite to handle any resistance.