Why do you need three shots for a biopsy?

The puncture biopsy is only performed once, which may be accurate or inaccurate, because the puncture biopsy is performed through a slender needle, penetrating the tumor or site to be biopsyed and taking a small amount of tissue for testing. When the diseased tissue is reached, the pathology is accurate. If the puncture does not reach the tissue that needs to be tested, and the diseased tissue is suspected, then the puncture is inaccurate. 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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