During fine-needle aspiration, a special needle goes into a breast lump and draws out any fluid that might be there. Ultrasound may be used to help place the needle. Ultrasound is a procedure that uses sound waves to show structures inside the body.
Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission.
Check out these best-sellers and special offers on books and newsletters from Mayo Clinic Press.
Your donation powers the future of medicine and helps save lives.