Capture: Circulating Tumour Dna Assessment of Pik3ca to Guide Treatment Response

Abstract

Many breast cancers shed small amounts of DNA (called circulating tumor DNA or ctDNA) into the patient’s bloodstream. This proposal is for a clinical trial which will examine the use of ctDNA to follow levels of a specific therapeutic target (a mutation in a gene called PIK3CA) in blood, to allow the timely introduction of a targeted therapy (PI3K inhibitor). The trial aims to lead to improved outcomes for women with estrogen receptor positive metastatic breast cancer.