In a lawsuit filed Wednesday in Los Angeles, actress Shannen Doherty revealed she is fighting breast cancer that developed while she was uninsured, after her former business-management firm neglected to pay her health insurance bill.

The "Beverly Hills, 90210" and "Charmed" star, 44, is suing the accounting firm Tanner Mainstain Glynn & Johnson and a former company partner, Steven D. Blatt, alleging they did not make timely payments for medical insurance Doherty had carried through the Screen Actors Guild.

The complaint, posted online by The Hollywood Reporter, lists numerous other accusations, including that the firm made unexplained payments to unidentified individuals; did not file taxes on time, resulting in tax liens; and diverted money from an insurance settlement on storm-damaged property.

The lawsuit states that in November 2013, Tanner Mainstain failed to pay Doherty's 2014 health insurance premium, without informing the actress. The firm terminated its relationship with Doherty in February 2014, and she belatedly discovered she was without insurance, remaining so until SAG's 2015 re-enrollment period.

According to the filing, when she subsequently was diagnosed with breast cancer this year, she was told "that, had she been insured and able to visit her doctor, the cancer could potentially have been stopped, thus obviating the need for the future treatment (including mastectomy and chemotherapy) that . . . [she] will likely have to suffer through now."

Doherty has been unable to work since the diagnosis, the filing states.

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"The relationship between a business manager and its client is based on trust, in honesty and competence," Doherty's attorney, Devin McRae, said in a statement to The Associated Press. "That trust was violated here, and we hope that the defendants will correct it in a responsible manner."

A publicist for Doherty could not be reached. Tanner Mainstain partner William H. Tanner did not respond to a Newsday request for comment.

On Wednesday, Doherty tweeted to well-wishers, "Just know . . . . I love you all."