Stereotactic biopsy is where mammography is used to guide the needle to biopsy a lesion. An ultrasound cannot detect all lesions, such as very early breast cancer called ductal carcinoma in situ (DCIS) which shows up as microcalcifications only seen on mammography. This is done by a radiologist, a doctor who reads x-rays and ultrasounds, in the radiology suite.
Ultrasound-guided biopsy is a procedure that can be done in the physician’s office to remove cells from a mass. This is often done the same day as your visit, depending on the type of mass that has been detected.
The procedure uses the ultrasound to help direct either a small needle for a fine needle aspiration or a slightly larger needle for a core needle biopsy. The benefit of using a larger needle is so the pathologist, the doctor who looks at the cells under the microscope, can tell how the cells are arranged.
Knowing how cells are arranged can help distinguish between non-invasive versus invasive cancer.
Open biopsy is a surgical procedure performed in the operating room to remove the lesion. This is done because either a core needle cannot be done, a previous biopsy did not provide a conclusive diagnosis, or there is a lesion that is at high risk for breast cancer. A small scar will remain but there is little change in the contour of the breast.