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A biopsy (in Greek: βίος life and όψηlook/appearance) is a medical test involving the removal of cells or tissues for examination. The tissue is generally examined under a microscope by a pathologist, and can also be analyzed chemically. When an entire lump or suspicious area is removed, the procedure is called an excisional biopsy. When only a sample of tissue is removed with preservation of the histological architecture of the tissue's cells, the procedure is called an incisional biopsyor core biopsy. When a sample of tissue or fluid is removed with a needle in such a way that cells are removed without preserving the histological architecture of the tissue cells, the procedure is called a needle aspiration biopsy.
A biopsy is a medical procedure where a sample of tissue is taken for testing.

This can refer to any type of body tissue. Biopsy can be done both externally for skin or wart testing; or internally by removing small bits of an organ or internal structure for further analysis.

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Q: What is the definition of biopsy?
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