A breast biopsy is a medical procedure used to remove a small sample of tissue from a breast lump or abnormal area for examination under a microscope. This test helps doctors determine if a growth or lump is benign (non-cancerous) or malignant (cancerous). There are different types of breast biopsy procedures, including fine needle aspiration (FNA), core needle biopsy, and surgical biopsy. The type of biopsy chosen depends on factors such as the location and size of the lump, as well as other clinical considerations. A breast biopsy is often recommended if an abnormality is detected during a mammogram, ultrasound, or physical examination.