Shannen Doherty is facing even more difficulty in her battle against breast cancer. The “Beverly Hills, 90210” and “Charmed” actress, 52, shared on Instagram that her cancer has spread to her brain. An emotional video posted Tuesday shows a crying Doherty wearing a mask and undergoing a CT scan at Cedars-Sinai in January. “My fear… Continue reading Shannen Doherty says breast cancer spread to brain