Stereotactic and Ultrasound Core Biopsies
A stereotactic biopsy is performed using a special type of X-ray instrument that can precisely locate the area of the breast from which the biopsy sample is to be taken. After an injection of lidocaine to anaesthetize the area, a small incision is made in the skin of the breast and a needle is computer guided to the exact biopsy site to collect a tissue sample. Stereotactic biopsy may not be appropriate for all types of breast lumps.
An ultrasound core biopsy uses a large needle fitted with a special cutting tip. Using an ultrasound image the physician guides the needle toward the lump, where it collects a core of tissue about the size of a pencil lead.