An endoscopic biopsy is a medical procedure used to collect tissue samples from inside the body for examination. It involves the use of an endoscope, a thin, flexible tube with a camera and light, which is inserted through natural openings or small incisions. This allows doctors to visualize and access areas such as the esophagus, stomach, or colon. During the procedure, the doctor uses special tools to remove small pieces of tissue. These samples are then sent to a laboratory for analysis, helping to diagnose conditions like cancer or infections. Endoscopic biopsies are generally safe and can provide valuable information about a patient's health.