Liquid biopsy is a minimally invasive test that detects cancer through a simple blood draw. It analyzes circulating tumor DNA (ctDNA) or other cancer-related substances in the blood. This method allows for the detection of cancerous changes at a molecular level, which can be particularly valuable for monitoring treatment response and detecting recurrence. Liquid biopsies are especially promising for cancers that are difficult to biopsy traditionally, such as lung cancer.
