Endobronchial Ultrasound (EBUS) is a minimally invasive procedure used to assess and diagnose conditions within the lungs and surrounding lymph nodes. It involves the use of a bronchoscope equipped with an ultrasound probe, which is inserted through the mouth and into the airways. The ultrasound provides real-time imaging of the structures inside the chest, allowing doctors to visualize and guide needle biopsies of lymph nodes or masses. EBUS is commonly used to diagnose lung cancer, infections, and other lung diseases, as well as to stage cancers by determining whether it has spread to the lymph nodes. The procedure is typically performed under sedation or anesthesia and offers a safer, less invasive alternative to traditional surgical biopsies.