biopsy

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biopsy

(bīäp`sē), examination of cells or tissues removed from a living organism. Excised material may be studied in order to diagnose disease or to confirm findings of normality. Preparatory techniques depend on the nature of the tissue and the kind of study intended. Incisions may be made and total or partial lesions removed in the form of wedges or cylindrical pieces, or scrapings of the surface membranes of internal organs may be collected. Needlelike instruments may be used to pierce the tissues and remove soft inner material. Once the tissue specimen has been obtained it is fixed, i.e., membrane proteins and enzymes are stabilized and chemical and histologic analyses are carried out by pathologists. Tumors are routinely biopsied in order to determine whether they are malignant. Fine needle aspiration is a technique more readily used for certain tumors or lesions because it is less expensive and damaging than traditional surgical biopsy.

biopsy

[′bī‚äp·sē]
(pathology)
The removal and examination of tissues, cells, or fluids from the living body for the purposes of diagnosis.

biopsy

1. examination, esp under a microscope, of tissue from a living body to determine the cause or extent of a disease
2. the sample taken for such an examination
References in periodicals archive ?
When a highly suspicious abnormality indicates percutaneous biopsy, the clinician must select the imaging technique for guidance and the method to be used (fine needle, core or both) based on characteristics of the abnormality.
Known Biopsy-Proven Malignancy: This category is reserved for examinations performed after biopsy proof of malignancy (Imaging performed after percutaneous biopsy, but prior to complete surgical excision), in which there are no mammographic abnormalities other than the known cancer that might need additional evaluation.
First, in patients with known extrarenal primary malignancy presenting with SMR, percutaneous biopsy should be performed when diagnostic doubt exists between a primary renal malignancy and a secondary location (Fig.
Risk of malignancy when microscopic radial scars and microscopic papillomas are found at percutaneous biopsy.
TP may be diagnosed by evaluating peritoneal biopsy samples obtained by laparotomy, laparoscopy and percutaneous biopsy via histological diagnostic methods.
The first ever percutaneous biopsy was performed by Paul Ehrlich in 1883 in Germany who got liver sample by aspiration1,2.
Fine needle aspiration or percutaneous biopsy was not performed.
However, before scheduling the patient for surgical excision in the operating room, every attempt should be made to determine, via percutaneous biopsy techniques (fineneedle aspiration cytology or core needle biopsy), whether the breast lesion is benign or malignant.
Percutaneous biopsy with ultrasound guidance to diagnose pancreas rejection has an overall diagnostic sensitivity of only 79%-88% (2, 3) and carries a major complication risk of ~2%-7% (4).
Trans-jugular liver biopsy can be performed successfully in patients with contraindications for percutaneous biopsy.

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