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A little more than a year after being diagnosed with breast cancer in February 2015, Shannen Doherty revealed her cancer has spread during an interview with Entertainment Tonight.

“I had breast cancer that spread to the lymph nodes, and from one of my surgeries we discovered that some of the cancer cells might have actually gone out of the lymph nodes,” Doherty told ET’s Jennifer Peros. “So for that reason, we are doing chemo, and then after chemo, I’ll do radiation.”

In May, the 45-year-old actress had a single mastectomy and though she “broke down crying in the dressing room” after a fitting for a new bra, it wasn’t the scariest part for her.

“The unknown is always the scariest part,” she said. “Is the chemo going to work? Is the radiation going to work? You know, am I going to have to go through this again, or am I going to get secondary cancer? Everything else is manageable. Pain is manageable, you know living without a breast is manageable. It’s the worry of your future and how your future is going to affect the people that you love.”

Last week, Doherty posted a series of Instagram pictures documenting her shaving her head. She said that after her second chemo treatment  her “hair was really matted, like in dreadlocks,” and when she went to brush it, “it just fell out.”

“I just remember holding onto huge clumps of my hair in my hands, and just running to my mom crying, like, ‘My hair, my hair, my hair, my hair,'” said Doherty.

Doherty said it was at that moment she told her mom to grab the kitchen scissors and cut her hair off.

“We did stages,” she recalled. “We did a pixie. And then we did a Mohawk, which was my favorite look. And then finally, we had to get the shaver thing and just buzz it off.”

In explaining her decision to post her hair chop online, Doherty said, “I wanted to put it out there the way it felt the best for me to put it out there. And also, if I could help one person then it makes me go, ‘Oh OK.’ It’s easier to live with having cancer if I know I’m helping at least one person.”

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