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  • DNA, repetitive

    DNA, repetitive: DNA sequences that are repeated in the genome. These sequences do not code for protein. One class termed highly repetitive DNA consists of short sequences, 5-100 nucleotides, repeated thousands of times in a single stretch and makes up satellite DNA. Another class termed moderately repetitive DNA consists of longer sequences, about 150-300 nucleotides, […]

  • Barr body

    Barr body: A microscopic feature of female cells that is due to the presence of two X chromosomes, one of which is inactive and crumples up.

  • Retinitis pigmentosa

    A group of inherited disorders in which abnormalities of the photoreceptors (the rods and cones) of the retina lead to progressive visual loss. Abbreviated RP. People with RP first experience defective dark adaptation (night blindness), then constriction of the visual field (tunnel vision), and eventually, late in the course of the disease, loss of central […]

  • Proteinuria

    Excess protein in the urine. Some protein is normal in the urine. Too much means protein is leaking through the kidney, most often through the glomeruli. The main protein in human blood and the key to the regulation of the osmotic pressure of blood is albumin. Proteinuria is synonymous with albuminuria.

  • CIC

    CIC: Completely-in-the-canal (the ear canal). See: Completely-in-the-canal hearing aid. See also: Hearing aid.

  • Blood pressure, high

    Blood pressure, high: Also known as hypertension, high blood pressure is, by definition, a repeatedly elevated blood pressure exceeding 140 over 90 mmHg — a systolic pressure above 140 or a diastolic pressure above 90. Chronic hypertension is a “silent” condition. Stealthy as a cat, it can cause blood vessel changes in the back of […]

  • Dyslexia

    A specific developmental disability that alters the way the brain processes written material. Because dyslexia is due to a defect in the brain’s processing of graphic symbols, it is thought of primarily as a learning disability. The effects of dyslexia vary from person to person. The only common trait among people with dyslexia is that […]

  • Heterozygote

    An individual who has two different forms of a particular gene, one inherited from each parent. A heterozygote for cystic fibrosis (CF) has the CF gene on one chromosome 7 and the normal paired gene on the other chromosome 7. Also known as carrier.

  • Gerstmann-Straussler syndrome

    Gerstmann-Sträussler-Scheinker syndrome.

  • Surgery, plastic

    The field of surgery concerned with reducing scarring or disfigurement that may occur as a result of accidents, birth defects, or treatment for diseases, such as skin cancers when removal of same results in disfigurement. Many plastic surgeons also perform cosmetic surgery that is unrelated to medical conditions, such as rhinoplasty to change the shape […]