(FOXNEWS) — Former "Good Morning America" host Joan Lunden says she has breast cancer.
She disclosed her diagnosis on Tuesday's edition of the ABC morning show, which she co-anchored from 1980 through 1997. She spoke with "GMA" host Robin Roberts, who has also been treated for breast cancer recently, as has "GMA" co-host Amy Robach.
Lunden said her treatment will include surgery and radiation. She said she's already started chemotherapy.
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She said after the initial shock of the diagnosis, she resolved to learn everything she can about the illness and go into what she called "warrior mode."