Sep 01, 2017 · What is a core needle biopsy? For a CNB, the doctor uses a wide, hollow needle to take out pieces of breast tissue from a suspicious area the doctor has felt or has pinpointed on an imaging test. The needle may be attached to a spring-loaded tool that moves the needle Last Revised: October 9, 2017.
Core needle biopsy with breast MRI. During a core needle biopsy with breast MRI, you lie on your stomach on a special table with a hole where your breast fits through. Before the procedure, you will be given a contrast agent by vein (through an IV). Your provider will use a local anesthetic to numb the breast .
What is a core-needle biopsy? Core needle biopsy is the procedure to remove a small amount of suspicious tissue from the breast with a larger “core” (meaning “hollow”) needle. It is usually performed while the patient is under local anesthesia, meaning the breast is numbed.
In a core needle biopsy, the automated mechanism is activated, moving the needle forward and filling the needle trough, or shallow receptacle, with 'cores' of breast tissue. The outer sheath instantly moves forward to cut the tissue and keep it in the trough. This process is repeated three to six times.