| RET | reticular; reticulocyte; retina; retention; retained; right esotropia |
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| RL | radial line; radiation laboratory; reduction level; renal dysplasia-limb defects [syndrome]; resisti... |
| RMC | reticular magnocellular [nucleus]; right middle cerebral [artery] |
| RN | radionuclide; red nucleus; Registered Nurse; registry number; residual nitrogen; reticular nucleus |
| TRN | tegmental reticular nucleus |
| brain iron | <radiology> Normal, Infant: NONE, Adult: globus pallidum, substantia nigra, red nucleus, dentate nucleus, Aging: (adult) and putamen, Degenerative disease, Parkinson disease: putamen, SN compacta, Huntington disease: caudate, putamen, Alzheimer disease: cerebral cortex, Hallervorden-Spatz disease, MS: thalamus, putamen, Others, AVM: malformation and rim, Bleed: rim macrophages, Haemorrhagic CVA: gyral / basal ganglia MRI: low T1 and T2 signal (12 Dec 1998) |
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| brain laceration | Gross tearing of neural tissue. (05 Mar 2000) |
| brain lipid | Impure cephalin possessing marked haemostatic action when locally applied. (05 Mar 2000) |
| brain mantle | Origin: L. See Pall the garment. 1. A large, square, woolen cloak which enveloped the whole person, worn by the Greeks and by certain Romans. It is the Roman name of a Greek garment. 2. A band of white wool, worn on the shoulders, with four purple crosses worked on it; a pall. The wool is obtained from two lambs brought to the basilica of St. Agnes, Rome, and blessed. It is worn by the pope, and sent to patriarchs, primates, and archbishops, as a sign that they share in the plenitude of the episcopal office. Befoer it is sent, the pallium is laid on the tomb of St. Peter, where it remains all night. 3. <zoology> The mantle of a bivalve. See Mantle. The mantle of a bird. Source: Websters Dictionary (01 Mar 1998) |
| brain metastases | <oncology, radiology> 10% of intracranial mass lesions are metastasis, 10-38% of patients with systemic cancer have brain metastasis: adults: lung, breast, GU tract, colon/rectum, melanoma, sinuses. children: neuroblastoma, embryonal rhabdomyosarcoma, Wilms tumour. Location: most in middle cerebral artery distribution at the cortex, 20% in posterior fossa. See also: haemorrhagic metastasis. (08 Mar 2000) |
| brain murmur | <neurology> Sounds produced by intracranial aneurysms or arterial venous aneurysms in congenital dysplastic angiomatosis. (05 Mar 2000) |
| brain natriuretic peptide | <hormone, protein> Brain peptide that induces diuresis, related to atrial natriuretic peptide. (18 Nov 1997) |
| brain neoplasm | Neoplasms of the part of the central nervous system contained within the cranium. (12 Dec 1998) |
| brain oedema | Brain swelling due to increased volume of the extravascular compartment from the uptake of water in the neuropile and white matter. See: brain swelling. Synonym: brain oedema. (05 Mar 2000) |
| brain potential | <physiology> The electrical charge of the brain as compared to a point on the body; the potential may be steady (DC potential) or may fluctuate at specific frequencies when recorded against time, giving rise to the electroencephalogram. (05 Mar 2000) |
| brain sand | Small calcareous concretions in the stroma of the pineal and other central nervous system tissues. Synonym: acervulus, brain sand, psammoma bodies. (05 Mar 2000) |
| brain-specific kinase | <enzyme> Expressed specifically in brain; member of the eph/elk receptor-like kinase family; mw 105 kD; may represent murine homolog of chicken cek7 receptor-like kinase; amino acid sequence given in first source Registry number: EC 2.7.1.- Synonym: bsk tyrosine kinase (26 Jun 1999) |
| Brain's reflex | Extension of the arm of a hemiplegic patient when turned prone as if on all fours. Synonym: Brain's reflex. (05 Mar 2000) |
| brain tissue transplantation | Transference of brain tissue, either from a foetus or from a born individual, between individuals of the same species or between individuals of different species. (12 Dec 1998) |
| brain tumour | <oncology, tumour> May be subdivided into primary brain tumours and the more common, secondary brain tumours. Primary brain tumours (for example astrocytoma, craniopharyngioma, glioma, ependymoma, neuroglioma, oligodendroglioma, glioblastoma multiforme, meningioma, medulloblastoma) arise from the uncontrolled proliferation of cells within the brain. Secondary brain tumours occur from the spread of cancer into the brain from a distant cancerous organ (metastasis). Common symptoms of a brain tumour include headache, nausea, vomiting, seizures, change in mentation, neurologic symptoms and loss of memory. (17 Dec 1997) |