Francis was diagnosed with a small but curable brain tumor and the diagnosis was made by Fukushima, who had flown to visit the Pope at the Vatican city.

The Vatican indignantly denied as "unfounded" and "gravely irresponsible" reports that Francis was diagnosed with a small but curable brain tumor after Fukushima found a 'dark spot'. The diagnosis was made by Fukushima, who had flown to visit the Pope at the Vatican city, the media claimed.
Fukushima removed two posts from his blog regarding two visits he said he made to the Vatican -- one in January, which did not mention a meeting with Francis and an earlier one that contained a photo of Fukushima meeting Francis at a general audience in St Peter's Square on October 1, 2014.
Source-IANS