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 ?
Acquiring a definitive diagnosis via percutaneous biopsy can prevent patients from undergoing unnecessary surgical intervention.
Changing role of imaging-guided percutaneous biopsy of adrenal masses: Evaluation of 50 adrenal biopsies.
A percutaneous biopsy of one of the new lesions once again confirmed AML.
The TLA was initially confused with hemangioma, but was later treated successfully with antituberculous therapy after the diagnosis was established by histopathologic examination of the specimen obtained by ultrasonography-guided percutaneous biopsy of the lesion.
Percutaneous biopsy of bladder-drained pancreas transplants.
Percutaneous biopsy is not as accurate as a histologic study and runs the risk of disseminating malignant cells through the puncture wound.
The mass was not amenable to percutaneous biopsy because of its location, so the decision was made to excise the lesion.
Risks and benefits of percutaneous biopsy and primary chemotherapy in advanced Wilms' tumour.
4) Tissue sampling from core biopsy may not adequately represent the entire lesion (5); foci of ADH or DCIS elsewhere in a papilloma may be missed at percutaneous biopsy.
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.

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