It involves taking a piece of body using a needle called a trocar. This is bigger than the needle used for blood sampling for example because it is intended to cut a sample (carrot) of solid fabric.
→ The conduct of a biopsy: It is most often under local anesthesia. The biopsy is done through the skin (breast, kidney, bone marrow), through a mucosa during endoscopy (uterus), or in a cavity (lungs, bladder, digestive organs).
It can be guided by imaging techniques (ultrasound, CT scan) to better identify the needle and the area to biopsy. There is an apparatus for automated biopsy for breast tumors called mammotome. The biopsy allows diagnosis of cancer The sample of tissue is examined microscopically (histologically) and the results of this review are then sent by the laboratory to medical oncologist.
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