Video: What is a biopsy?

A biopsy is the removal of cells or tissues for examination under a microscope. When only a sample of tissueis removed, the procedure is called an incisional biopsy or core biopsy. When an entire tumor or lesion is removed, the procedure is called an excisional biopsy. When a sample of tissue or fluid is removed with a needle, the procedure is called a needle biopsy or fine-needle aspiration.

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Learn more about bladder cancer by perusing our Glossary of Terms.