Promising diagnostic test for breast cancer brain metastasis never gets off the ground

This study was designed to see if analyzing tiny particles called exosomes in spinal fluid could help doctors diagnose leptomeningeal metastasis—a serious complication where breast cancer spreads to the membranes around the brain and spinal cord. Researchers planned to collect spinal fluid and blood samples from breast cancer patients with suspected spread. However, the study was withdrawn before any participants were enrolled, so no results are available.