Cancer
Why it is trending in America today
Pope Leo cleared to travel to South America after lung cancer surgery

Cancer is trending because Pope Leo XIV, who had surgery for lung cancer on Oct. 13, was cleared by the Vatican on Monday to make a 12-day trip to South America. A Vatican official called his cancer diagnosis a "gamechanger" for the papacy, according to headlines from Reuters and AP.
The background
VATICAN CITY, Oct. 28 — Doctors removed the lower lobe of Pope Leo's right lung on Oct. 13 after finding a malignant tumor. The cancer was a type called lung adenocarcinoma, and it was found by chance during a routine abdominal exam, doctors said. The operation went well with no complications, and he went home on Oct. 17.
On Monday the Vatican said there were no medical reasons to stop him from taking his planned trip to Uruguay, Argentina and Peru. The 71-year-old pope will visit 10 cities and board 14 flights. Peru's Cuzco sits above 11,000 feet, and its thin air could be hard on someone recovering from lung surgery, but it remains on the schedule. Leo, the first American-born pope, spent more than two decades as a missionary and bishop in Peru.
What happens next
The South American trip to Uruguay, Argentina and Peru is set for Nov. 6 to 17.
What else people are searching
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Key facts
- Pope Leo XIV had surgery on Oct. 13 to remove the lower lobe of his right lung.
- The tumor was identified as lung adenocarcinoma and was found during a routine abdominal exam.
- The Vatican said on Monday he is cleared for the trip to South America.
- The trip covers Uruguay, Argentina and Peru from Nov. 6 to 17.
- A Vatican official described the diagnosis as a gamechanger for the papacy.
What we don't know yet
It is not clear from the headlines what the Vatican official meant by the term, and the sources do not give details on how the papacy will change.
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Trend data
Cancer started trending in the US on Oct 28, 5:40 AM EDT, reaching about 100+ Google searches. 4 news outlets covered it in our feed, including Reuters, MLB.com, CBS News. The earliest report we found came from Reuters at Oct 27, 2:33 PM EDT.