Doctors say the pope's health situation is complicated because he had part of his lung removed in his 20s. Currently, his medical team is managing a number of issues.

Pope Francis, 88, was resting Monday morning, his 10th day at the hospital for a complex lung infection that led to the early stages of kidney insufficiency.

The pontiff's condition is touch-and-go, given his age, fragility and pre-existing lung disease, according to doctors.