This procedure has accompanied the birth of Interventional Radiology and has gained wide acceptance for their efficiency in providing a diagnosis.

The biopsy is performed through the skin (percutaneous) from the nearest point to the tumor being the introduction of the needle-guided precision and in real time using fluoroscopy, ultrasound or CT scan. Virtually any image tumor seen by some of these reviews, even very small, can be achieved by a needle to take a sample.

The fine-needle biopsy (20 to 25g), to obtain by scraping a few cells, which will be studied by modern techniques of citopatolo-nology, which will inform us whether the cells are benign or malignant in a patient who has appeared in a tumor or in the case of a patient who has a malignant tumor and has undergone chemotherapy treatments, embolization or Radio and consequently what they want to know whether it is active or tumor necrosis (destruction of the tumor).

The biopsy needle with coarse (16 to 19g), to obtain a larger sample or a cylinder which retains the structure of the cells in the tissue, allowing a precise diagnosis of tissue, which will give us important information that will be taken into account on the best treatment for the patient.

The image-guided percutaneous biopsy is very accurate, requires no cutting, no need for hospitalization and return to their normal activities the following day. Usually a fairly safe procedure with less than 1% of complications. It provides a precise diagnosis in 90% of patients.

The image-guided percutaneous biopsies have the following advantages:

1 .- The guide leads images of the tumor, avoiding vascular and nerve structures, with greater precision than in an open surgery, thus avoiding major complications.

2 .- The patient avoids the pain he was using a conscious sedation during the procedure, as well as internal scarring and other complications that can sometimes deals with an open surgery.

3 .- It does not require general anesthesia or hospitalization.