A core biopsy is a medical procedure used to obtain a small sample of tissue from a suspicious area, often in the breast or other organs. This technique involves using a hollow needle to extract a cylindrical piece of tissue, which is then examined under a microscope for signs of disease, such as cancer. Core biopsies are typically guided by imaging techniques like ultrasound or CT scans to ensure accuracy. The procedure is usually performed on an outpatient basis and may involve local anesthesia to minimize discomfort. Core biopsies are less invasive than surgical biopsies and can provide crucial information for diagnosis and treatment planning. Results from the biopsy help doctors determine the best course of action for the patient.