Actress Shannen Doherty said she is "staying positive" after receiving less-than-favorable test results on the progress of her breast cancer treatment.

The former Beverly Hills 90210 star, who is in remission for breast cancer, shared her most recent round of test results on Tuesday on Instagram, MSN.com reports. 

"Test and results. One tumor marker test came back good. Other... elevated," she captioned a selfie on Instagram. "Just means I get monitored and another test."

Doherty, 46, said "cancer changes your life," but that she is keeping a positive outlook.

"But even after that call, I’m staying positive and taking stock of my life," she said. "It certainly helps put things in perspective and reminds you of what you learned thru the cancer journey. And I sometimes, need a refresher.

"As I’ve said before, cancer changes your life in ways no one could ever imagine. Btw, the elevation can be from all sorts of things. Oh and vitamin D... need more of that too."

The actress was first diagnosed with breast cancer in August 2015 and underwent several rounds of chemotherapy, as well as a single mastectomy.