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 ?
[16] it was shown that the C[O.sub.2] laser provoked severe tissue artifacts characterized by cell atypias and degeneration of epithelium in a pseudodysplastic sense creating possible misdiagnosis with a bad bioptic response and leading to wrong therapies.
The athlete was submitted to a bioptic sampling of the laterocervical lymph nodes confirming the diagnosis previously hypothesized.
Histopathology of bioptic samples revealed epithelioid neoplastic proliferation with a tubulopapillary pattern, falsely suggesting metastatic adenocarcinomatosis.
In bioptic specimens, it is important to pay attention to cytoplasmic and nuclear features to distinguish between oncocytoma and chromophobe renal cell carcinoma, a distinct tumor with an intermediate prognosis.
All of the SurePOS 700 units will also be fitted with a hand-held barcode scanner from Symbol Technologies, a flatbed bioptic scanner from NCR and a thermal printer and touchscreen from IBM.
Each unit will be fitted with a hand-held barcode scanner from Symbol Technologies, a flatbed bioptic scanner from NCR, an IBM SureMark 4610 thermal printer and an IBM 4820 SurePoint touchscreen.
In sum, AIDS patients with oral candidiasis in countries similar to Uganda can be managed without endoscopic and bioptic assessments since oral lesions are typical and a high prevalence of esophageal involvement is expected (with or without symptoms) ([is greater than] 90% of cases in our study).
After transrectal needle biopsies of the prostate and TURP performed at the Clinic for Urology, the bioptic materials of 195 male patients were histopathologically analyzed.
Sinus bioptic samples were also stimulated with common allergens, like Aspergillus and house dust mites, known to activate epithelial cells due to their protease activity [15,16].
Six months after the sinus lift surgery, bioptic samples were harvested (one sample was analyzed for each patient) and implants were placed under local anesthesia.
He continued: "I was struck when I was being driven by a man who has been wearing a bioptic telescope for at least 15 or 20 years by that time.
Transportation is regarded as particularly difficult for persons who are blind or have low vision (hereafter, visually impaired) because most are unable to drive--although a small percentage of persons with vision loss benefit from adaptive technology that may assist in driving, such as bioptic devices.