| TLA | thymus leukemia antigen; tissue lactase activity; tongue-to-lip adhesion; translaryngeal aspiration;... |
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| LE | lactate extraction; left ear; left eye; leukocyte elastase; leukoerythrogenic; live embryo; Long Eva... |
| MCL | maximum containment laboratory; medial collateral ligament; midclavicular line; midcostal line; mini... |
| MLTC | mixed leukocyte-trophoblast culture; mixed lymphocyte tumor cell |
| MSLR | mixed skin cell-leukocyte reaction |
| leukocyte cream | <haematology> Thin yellow white layer of leucocytes on top of the mass of red cells when whole blood is centrifuged. (18 Nov 1997) |
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| leukocyte disorders | Disordered formation of various types of leukocytes or an abnormal accumulation or deficiency of these cells. (12 Dec 1998) |
| leukocyte elastase | <enzyme> An enzyme that catalyses the hydrolysis of proteins, including elastin. It cleaves preferentially bonds at the carboxyl side of ala and val, with greater specificity for ala. Registry number: EC 3.4.21.37 (12 Dec 1998) |
| leukocyte esterase | <enzyme> The presence of leukocyte esterase is indirect evidence for the presence of white blood cells in the urine. The standard urinalysis dip test allows for the quick determination of leukocyte esterase presence via a colour reaction on a urine test strip. A positive test indicates a urinary tract infection. (27 Sep 1997) |
| leukocyte inclusions | Discrete round or oval body's ranging in diameter from just visible to 2 um, which stain sky blue to gray blue with Romanowsky stains, found in neutrophils of patients with infections, burns, trauma, pregnancy, or cancer. Synonym: Dohle inclusions, leukocyte inclusions. (05 Mar 2000) |
| leukocyte interferon | <cytokine> One of the type I interferons produced by peripheral blood leukocytes or lymphoblastoid cells when exposed to live or inactivated virus, double-stranded RNA, or bacterial products. It is the major interferon produced by virus-induced leukocyte cultures and, in addition to its pronounced antiviral activity, causes activation of NK cells. It is used experimentally in the treatment of hairy-cell leukaemia. A number of different subtypes exist that are elaborated by leukocytes in response to viral infection or stimulation with double-stranded RNA; IFN-alpha-2A and -2B are protein products made by recombinant DNA techniques and are used as antineoplastic agents. See: interferon-alpha 2a, interferon-alpha 2b Synonym: leukocyte interferon. Pharmacological action: antineoplastic agent, antiviral agent. (20 Sep 2002) |
| leukocyte migration-inhibitory factors | Protein factor(s) released by sensitised lymphocytes (and possibly other cells) that inhibit the movement of leukocytes, especially polymorphonuclear cells, away from their site of release. Assays for these factors are used as tests for cellular immunity. Two of the common assays are the leukocyte migration capillary tube technique (lmct) and the leukocyte migration agarose technique (lmat). (12 Dec 1998) |
| leukocyte transfusion | The transfer of leukocytes from a donor to a recipient or reinfusion to the donor. (12 Dec 1998) |
| leukocyte tyrosine kinase receptor tyrosine kinase | <enzyme> May be receptor for pre-b lymphocyte growth or differentiation factor; aa sequence given in first source Registry number: EC 2.7.1.- Synonym: ltk receptor tyrosine kinase, ltk receptor tk, ltk protein, leukocyte tyrosine kinase (ltk) (26 Jun 1999) |
| T-cell-rich, B-cell lymphoma | <tumour> A B-cell lymphoma in which more than 90% of the cells are of T-cell origin, masking the large cells that form the neoplastic B-cell component. See: adult T-cell lymphoma. (05 Mar 2000) |
| absorption cell | A small glass chamber with parallel sides, in which absorption spectra of solutions can be obtained. (05 Mar 2000) |
| acid cell | One of the cell's of the gastric glands; it lies upon the basement membrane, covered by the chief cell's, and secretes hydrochloric acid that reaches the lumen of the gland through fine intracellular and intercellular canals (canaliculi). Synonym: acid cell, oxyntic cell. (05 Mar 2000) |
| acidophil cell | A cell whose cytoplasm or its granules stain with acid dyes. (05 Mar 2000) |
| acinar cell | Any secreting cell lining an acinus, especially applied to the cell's of the pancreas that furnish pancreatic juice and enzymes to distinguish them from the cell's of ducts and the islets of Langerhans. Synonym: acinous cell. (05 Mar 2000) |
| acinar cell tumour | A solid and cystic tumour of the pancreas, occurring in young women; tumour cells contain zymogen granules. (05 Mar 2000) |