Endobronchial Ultrasound (EBUS) with Transbronchial Needle Aspiration (TBNA) is a minimally invasive technique used to obtain tissue samples from lymph nodes or tumors in the chest. Dr. Mayank uses EBUS TBNA to diagnose lung cancer, infections, or sarcoidosis. The procedure involves using ultrasound imaging to guide a needle through the bronchial walls to collect samples. It provides valuable diagnostic information without the need for major surgery.