Ozzy Osbourne said he had stem cell treatment for his spine in an April 30 episode of his SiriusXM radio show, USA Today reported.

The treatment was done after physicians discovered a tumor on his vertebrae, the report said.

Mr. Osbourne revealed struggles after spine surgery in an interview with Rolling Stone UK published Nov. 26. He had four spinal surgeries to remedy damage from a fall that occurred in 2019.