By EW Staff
Updated August 19, 2015 at 12:00 PM EDT
Gabriel Olsen/FilmMagic

Shannen Doherty is undergoing treatment for breast cancer, according to People.

The decision by the Beverly Hills, 90210 star to reveal her illness came about after TMZ reported that she was suing her former business manager for failing to pay her insurance premiums. According to People, the lawsuit alleges that his lack of action resulted in the cancellation of her insurance policy so she wasn’t able to receive medical care.

“I am continuing to eat right, exercise and stay very positive about my life,” the actress told the magazine. “I am thankful to my family, friends and doctors for their support and, of course, my fans who have stood by me.”

For more about Doherty, go to People.