“Treating breast cancer patients with AstraZeneca’s experimental pill camizestrant at the first sign of resistance to standard therapies cut the risk of disease progression or death by half, a finding that could be practice changing, experts said on Sunday.

The results, presented at the American Society of Clinical Oncology meeting in Chicago, mark the first use of a blood test called a liquid biopsy to indicate the need for a change in treatment in women with a common form of breast cancer, even before tumor growth can be detected on imaging.

The early switch approach in women with hormone receptor-positive, HER2-negative breast cancer resulted in a 56% reduction in the risk of disease progression or death, said Dr. Eleonora Teplinsky, an oncologist at Valley-Mount Sinai Comprehensive Cancer Care and an ASCO breast cancer expert.”

From Reuters.