An endoscopist is a medical professional who specializes in performing endoscopy, a procedure that allows doctors to examine the interior of a patient's body using a flexible tube with a camera, known as an endoscope. This technique is commonly used to investigate issues in the digestive tract, lungs, and other internal organs, helping to diagnose conditions such as ulcers, tumors, and infections. Endoscopists often work in collaboration with other healthcare providers, including gastroenterologists and surgeons, to provide comprehensive care. They are trained to interpret images captured during the procedure and may also perform therapeutic interventions, such as removing polyps or taking biopsies, to aid in patient treatment and management.