Shannen Doherty is “very positive” as she battles stage 4 breast cancer.“She’s being very proactive and it’s a difficult situation but I think that Shannen is managing it in a positive way,” Priestley, 54, told The Post while promoting his new CW series, “Wild Cards.”“She’s using her [podcast] platform to try to help people and it’s a very admirable quality.”Doherty, 52, was diagnosed with breast cancer in 2015 after her dog, Bowie, started to “obsessively sniff” her side, according to an interview she did with CBS News last November.In 2016, the cancer spread to her lymph nodes and she underwent eight brutal rounds of radiation and chemotherapy.She went into remission the following year, but in 2018 her tumor markers became elevated, according to the Associate Press — and, in 2020, she announced on “Good Morning America” that her cancer had returned as stage 4.In January 2023, Doherty shared on Instagram that the cancer had spread to her brain. “But that fear….
