Shannen Doherty’s Breast Cancer Anguish

Shannen splash

Shannen Doherty is fighting breast cancer – and her ex-business managers!

The National ENQUIRER has obtained a copy of the lawsuit in which the “Beverly Hills, 90210” star, 44, claimed Tanner, Mainstain, Glynn & Johnson ignored a 2013 invoice for her Screen Actors Guild health insurance premium.

“Shannen believes wholeheartedly that if they had paid her premiums, she would have gone to the doctors as she always had,” a source said. “They would have discovered the cancer a lot earlier!”

When she re-enrolled this year doctors discovered “invasive breast cancer metastatic to at least one lymph node.”

The actress was told her cancer spread in 2014 while uninsured.

She blames her management firm, which netted five percent of her earnings for handling her finances.

Shannen had breast enhancement surgery during her tenure at “90210,” and recently sold her Malibu home for $2.3 million.

Her aggressive and costly treatments will likely include chemotherapy and a mastectomy.