Why do I need to shoot three shots for a needle biopsy?

The biopsy needle has been performed only once, which may be accurate or inaccurate, because the needle biopsy is to penetrate the tumor or part to be biopsy and take a small amount of tissue for testing. If the puncture is just right If the pathological tissue is penetrated, then the pathology is accurate. If the puncture does not puncture the tissue that needs to be tested, and the diseased tissue is suspected, then the puncture is not accurate. Therefore, the puncture biopsy is often inaccurate and needs to be performed multiple times. , Or rely on other tests to assist diagnosis.

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