<unk>  <unk>  is a diagnostic procedure used to investigate lumps or masses. In this technique, a thin (23–25 gauge (0.52 to 0.64 mm outer diameter)), hollow<unk>  is inserted into the mass for sampling of cells that, after being stained, are examined under a microscope (biopsy). The sampling and biopsy considered together are called<unk>  biopsy <unk> B) or<unk>  cytology <unk> C) (the latter to emphasize that any<unk>  biopsy involves cytopathology, not histopathology).<unk>  biopsies are very safe minor surgical procedures. Often, a major surgical (excisional or open) biopsy can be avoided by performing a<unk><unk>  biopsy instead, eliminating the need for hospitalization. In 1981, the first<unk>  biopsy in the United States was done at Maimonides Medical Center. Today, this procedure is widely used in the diagnosis of cancer and inflammatory conditions.<unk>  is safer and far less traumatic than an open biopsy; complications beyond bruising and soreness are rare. However, the few problematic cells can be too few (inconclusive) or missed entirely (a false negative).
Fine-needle aspiration
FNA Mapping
Needle-localized biopsy
Caldwell-Luc surgery
Breast biopsy
Open biopsy
Lymphadenectomy
Radiomics