The removal of tissue or fluid with a needle for examination under a microscope. When a wide needle is used, the procedure is called a core biopsy. When a thin needle is used, the procedure is called a fine-needle aspiration biopsy.
Fine-needle aspiration is used when a doctor finds a lump that appears to be a cyst. Removal of fluid from the lump is done using a thin needle and a syringe.
A core needle biopsy uses a needle with a special cutting edge. The core needle is inserted through a small cut in the skin, and a small core of tissue is removed.

Available Now!

PPRG6-500 Cover
The Pituitary Patient Resource Guide Sixth Edition is now available! Be one of the first to have the most up-to-date information. The Pituitary Patient Resource Guide a one of a kind publication intended as an invaluable source of information not only for patients but also their families, physicians, and all health care providers. It contains information on symptoms, proper testing, how to get a diagnosis, and the treatment options that are available. It also includes Pituitary Network Association's patient resource listings for expert medical care.

Buy Now