In 2015, Smulders (Robin) revealed she had been diagnosed with ovarian cancer at age 25, while shooting season three of How I Met Your Mother.
She had surgery to remove two tumors from her ovaries, but the cancer had spread to her lymph nodes, resulting in the need for multiple surgeries over the course of two years.
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Things You Didn't Know About HIMYM
FanfictionHere are some mind-blowing facts that you probably didn't know about the show How I Met Your Mother.