A physician's hands are seen performing a needle biopsy to determine the nature of a lump, either a fluid-filled cyst or solid tumor. The skin above the area to be biopsied is swabbed with an antiseptic solution and draped with sterile surgical towels. The skin, underlying fat, and muscle may be numbed with a local anesthetic, although this is often not necessary with superficial masses. After locating the mass for biopsy, using x-rays or palpation, a special needle of very<unk>  diameter is passed into the mass. The needle may be inserted and withdrawn several times. There are many reasons for this: * One needle may be used as a guide, with the other needles placed along it to achieve a more precise position. * Sometimes, several passes may be needed to obtain enough cells for the intricate tests which the cytopathologists perform. After the needles are placed into the mass, cells are withdrawn by<unk>  with a syringe and spread on a glass slide. The patient's vital signs are taken again, and the patient is removed to an observation area for three to five hours. * For biopsies in the breast, ultrasound-guided<unk> -needle biopsy is the most common. The biopsy is advised.
Fine-needle aspiration
FNA Mapping
Needle-localized biopsy
Caldwell-Luc surgery
Breast biopsy
Open biopsy
Lymphadenectomy
Radiomics