VATICAN CITY (CNS) — Pope Francis underwent a CT scan at Rome’s Gemelli Isola Hospital on November 25 to rule out pulmonary complications after canceling his morning appointments because of what the Vatican press office described as a slight flu.

The results of the CT scan were negative, and the pope returned to his residence, the Domus Sancte Marthae, the Vatican press office said in a note sent to reporters on the Telegram messaging app.

The pope, who will celebrate his 87th birthday on December 17, had undergone surgery in 1957 to remove part of one of his lungs after suffering a severe respiratory infection. He has insisted the operation has had no lasting impact on his health.

But Pope Francis was hospitalized March 29-April 1 for what doctors said was a “respiratory infection.” He tested negative for COVID-19.

Early on November 25, Matteo Bruni, director of the Vatican press office, issued a statement saying the pope’s appointments for the day had been canceled “due to a slight flu-like condition.”

Five hours later, he issued a statement saying the pope had gone to the hospital for the CT scan “to rule out the risk of pulmonary complications. The test was negative,” and the pope returned to his residence.

The pope had been scheduled to meet that morning with President Umaro Sissoco Embaló of Guinea Bissau.

The Vatican did not say if Pope Francis was expected to keep his usual Sunday appointment to recite the Angelus at noon on November 26 with visitors in St. Peter’s Square. He is scheduled to travel to Dubai in the United Arab Emirates on December 1-3 to address COP28, the U.N. climate change conference.