An endoscopic biopsy is a medical procedure used to obtain tissue samples from inside the body for diagnostic purposes. During the procedure, a thin, flexible tube called an endoscope is inserted through natural openings or small incisions. The endoscope is equipped with a camera and tools to collect tissue samples from areas such as the esophagus, stomach, or colon. The collected tissue is then examined under a microscope by a pathologist to identify any abnormalities, such as cancer or infections. This minimally invasive technique helps doctors make accurate diagnoses and determine appropriate treatment options for patients.