A needle biopsy is performed under local anesthesia. Simple aspirations are performed with a small gauge needle to attempt to draw fluid from lumps that are thought to be cysts. Fine needle biopsy uses a larger needle to make multiple passes through a lump, drawing out tissue and fluid. Withdrawn fluid and tissue is further evaluated to determine if there are cancerous cells present.
Review Date 10/16/2020
Updated by: Todd Campbell, MD, FACS, Clinical Assistant Professor Department of Surgery, Volunteer Faculty, Rowan University School of Osteopathic Medicine, Stratford, NJ; Medical Director, Independence Blue Cross, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.