Can medical needle biopsy cause cancer to spread?

a needle biopsy does not cause the cancer to metastasize or spread.

puncture is a very common biopsy method in the department of oncology. it is mainly a diagnosis and treatment technique in which the needle is inserted into the body cavity to extract secretions for laboratory tests, and the gas or contrast agent is injected into the body cavity for angiography examination, or the drug is injected into the body cavity. in fact, the purpose of a puncture is to draw blood for testing, transfusion, infusion, and placement of a catheter for angiography.

tumor biopsy is a necessary step for further diagnosis of cancer, mainly to further confirm whether the tumor is benign or malignant. in real life, when many people mention puncture surgery, not only the patient will feel afraid, but also the family members are very worried, many people think that puncture will lead to tumor metastasis. in fact, this is also completely nonsense, piercing does not cause cancer cells to metastasize at all, the main reason for this is the following reasons:

one is because the needle that undertakes tumor puncture commonly is small (it is 0.4 ~ 0.7 millimeter commonly), the wound that is opposite normal tissue and tumor is very small also.

the second reason is that the puncture site is usually far from the larger blood vessels, in which case it is impossible for cancer cells to enter the bloodstream.

thirdly, the examination time of puncture is also very short. if the examination result is malignant, the doctor will immediately remove the tissue around the puncture needle channel for the patient to avoid the occurrence of cancer cell planting. because the time is relatively short, cancer cells do not have time to metastasize. in addition, doctors will quickly give patients chemotherapy or targeted drugs to kill the primary tumor. in the process, the cancer cells shed along the needle passage cannot withstand the powerful attack of the drug and are quickly killed.

because of the above three reasons, the puncture will not cause cancer cells to metastasize at all, so don't worry about it.

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