A breast biopsy for small lesions measuring less than 1 centimeter is a minimally invasive diagnostic procedure used to evaluate suspicious abnormalities detected via screening mammography or ultrasound. Due to the small size of the target, this procedure is typically performed using precise image guidance—such as stereotactic or ultrasound—to ensure the accurate placement of a core needle or vacuum-assisted device. The radiologist extracts multiple tiny tissue samples from the lesion. These samples are then sent to a pathology laboratory for microscopic analysis to determine if the growth is benign, pre-cancerous, or malignant, enabling early detection and appropriate treatment planning.