VATICAN CITY (CBS) — A report in an Italian newspaper says Pope Francis has a small, curable brain tumor.

The Vatican is denying the claims.

Citing unnamed sources, the paper says the 78-year-old pontiff has a dark spot on his brain that can be cured without surgery.

A Vatican spokesperson calls the claims “completely unfounded and seriously irresponsible and not worthy of attention.”

The paper is standing by its reporting.