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1. Process of removing tissue from living patients for diagnostic examination. 2. A specimen obtained by b. [bio- + G. opsis, vision]
aspiration b. needle b
brush b. b. obtained by passing a bristled catheter into the ureter or pyelocalyceal system to remove cells from suspected areas of disease by entrapping them in the bristles.
chorionic villus b. transcervical or transabdominal sampling of the chorionic villi for genetic analysis.
endoscopic b. b. obtained by instruments passed through an endoscope or obtained by a needle introduced under endoscopic guidance.
excision b. excision of tissue for gross and microscopic examination in such a manner that the entire lesion is removed.
fine needle b. removal of tissue or suspensions of cells through a small needle.
incision b. removal of only a part of a lesion by incising into it.
needle b. any method in which the specimen for b. is removed by aspirating it through an appropriate needle or trocar that pierces the skin, or the external surface of an organ, and into the underlying tissue to be examined.aspiration b;
open b. surgical incision or excision of the region from which the b. is taken.
punch b. any method that removes a small cylindrical specimen for b. by means of a special instrument that pierces the organ directly or through the skin or a small incision in the skin.trephine b;
shave b. a b. technique performed with a surgical blade or a razor blade; used for lesions that are elevated above the skin level or confined to the epidermis and upper dermis, or to protrusions of lesions from internal sites.
sponge b. abrasion of a lesion with a suitable sponge.
trephine b. punch b
wedge b. excision of a cuneiform specimen.
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