Persistent cough, blood in sputum, breathlessness or chest pain? Learn lung cancer warning signs, risk factors, and tests like CT, bronchoscopy and biopsy.
Liquid biopsy is a blood test that detects circulating tumor DNA (ctDNA) to help guide targeted therapy and personalized cancer care, especially when tissue biopsy is difficult or insufficient. It can also help monitor response. A negative result may still need tissue confirmation.
