| MART | multiplicative algebraic reconstruction technique |
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| MIGT | multiple inert gas elimination technique |
| MOTSA | multiple overlapping thin slab acquisition [technique] |
| NGT | nasogastric tube; nominal group technique; normal glucose tolerance |
| NOBT | nonoperative biopsy technique |
| 17-ketogenic steroid assay test | A colourimetric test, based on the Zimmermann reaction, which indicates metabolites or adrenal and testicular steroids excreted as 17-ketones in the urine; increased values are most striking in adrenocortical tumours, decreased values in Addison's disease or in panhypopituitarism. Synonym: ketogenic corticoids test. (05 Mar 2000) |
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| focus-forming assay | <investigation> A lab technique used to find out if a particular piece of DNA contains oncogenes (genes which are associated with cancer). This is done by putting the DNA into animal cells which normally show contact inhibition, or which stop growing when they come into physical contact with other cells or reach a certain density in the culture. If the cells lose contact inhibition and form areas of densely-packed cells (called foci) after receiving the DNA, it means that the DNA did contain oncogenes. (05 Jan 1997) |
| leukocyte adherence assay test | A test to detect the ability of leukocytes to adhere to bacteria, performed in vitro using nylon fibres to measure adherence. (05 Mar 2000) |
| leukocyte bactericidal assay test | A test of leukocytes to determine their ability to kill a culture of live bacteria. (05 Mar 2000) |
| LH assay | A blood test which measures the amount of luteinising hormone (LH). LH is a protein hormone that is secreted by the anterior pituitary gland. In women, a surge in LH at midcycle causes ovulation. For the next 7-10 days LH maintains the corpus luteum which synthesises progesterone. The corpus luteum disintegrates after about 10 days if fertilization does not occur. In men, LH stimulates production of testosterone by the Leydig cells in the testes. This test may be used to evaluate anovulatory bleeding, infertility, ovarian cysts and multiple endocrine neoplasia (MEN) I. Normal values in males: 7 to 24 U/L. Normal values in females: greater than 6-30 U/L. Greater than normal values can indicate: anorchia, hypogonadism, Klinefelter syndrome, menopause, ovarian failure, polycystic ovary disease, precocious puberty and Turner's syndrome. Lower than normal values can indicate hypopituitarism. (27 Sep 1997) |
| Lowry-Folin assay | A method for determining protein concentrations using the Folin-Ciocalteu reagent. Synonym: Lowry-Folin assay. (05 Mar 2000) |
| Lowry protein assay | A method for determining protein concentrations using the Folin-Ciocalteu reagent. Synonym: Lowry-Folin assay. (05 Mar 2000) |