Kathleen Mason, who lost her job as the CEO of a Dallas-based retailer, claims through her lawyer that her dismissal had nothing to do with poor performance and everything to do with disclosing to her board that she was battling breast cancer

Mason has gone from “surprised and disappointed” in early June, right after Tuesday Morning announced her removal as CEO, to filing a complaint with the Equal Employment Opportunity Commission for disability discrimination on August 1.

She informed others at the firm of her diagnosis in January and February, but she insisted that her illness would not interfere with her work at Tuesday Morning. She was fired over the phone just three months later, according to her EEOC complaint, as reported in The Dallas Morning News.

According to the Wall Street Journal, a Dallas investment firm and major shareholder in Tuesday Morning claimed Mason lost her job because of poor performance, which caused an “extraordinary destruction of shareholder value.”

Since 2005, company shares have lost more than 80 percent of their value.

But Kathleen Mason and her attorney Rogge Dunn, of Clouse Dunn LLP, disagree. They claim that Tuesday Morning investors had made more than $700 million on their $117 million investment. Furthermore, during Mason’s 12-year tenure as CEO, she paid down the company’s long-term debt.

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