Shannen Doherty is reflecting on a heartbreaking moment amid her battle with cancer.

The Charmed alum—who shared her stage 4 breast cancer diagnosis in 2020—recently opened up about the emotional process she endured while having to undergo surgery earlier this year.

"January 16, 2023," she wrote alongside a June 13 Instagram video of herself in the hospital. "Surgery. I had a tumor in my head they wanted to remove and also biopsy. I am clearly trying to be brave, but I am petrified. The fear was overwhelming to me."

That fear also extended to those closest to Doherty.

"Scared of all possible bad outcomes, worried about leaving my mom and how that would impact her," she noted. "Worried that I would come out of surgery not me anymore. This is what cancer can look like."

The glimpse into Doherty's journey comes a little more than a week after she shared her cancer had metastasized to her brain, explaining that doctors found the development during scans.

"Yesterdays video was showing the process of getting fitted for the mask which you wear during radiation to your brain, the Beverly Hills, 90210 alum wrote in a June 6 Instagram post. "January 12, the first round of radiation took place."

Noting that her distress was "obvious," Doherty went on to thank the team of doctors that have helped her along the way.

"But that fear…. The turmoil….. the timing of it all," she continued. "This is what cancer can look like."