biopsy

(BY-op-see) The removal of cells or tissues for examination by a pathologist. The pathologist may study the tissue under a microscope or perform other tests on the cells or tissue. There are many different types of biopsy procedures. The most common types include: (1) incisional biopsy, in which only a sample of tissue is removed; (2) excisional biopsy, in which an entire lump or suspicious area is removed; and (3) needle biopsy, in which a sample of tissue or fluid is removed with a needle. 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.

(by' op-see) the removal and examination, usually very small (microscopic) sample size, of tissue from the living body, performed to establish a precise diagnosis.

(BY-ah-psee): To remove cells or tissues from the body for testing and examination under a microscope.