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cast (kast)

1. An object formed by the solidification of a liquid poured into a mold. 2. Rigid encasement of a part, as with plaster or a plastic, for purposes of immobilization. 3. An elongated or cylindrical mold formed in a tubular structure (e.g., renal tubule, bronchiole) that may be observed in histologic sections or in material such as urine or sputum; results from inspissation of fluid material secreted or excreted in the tubular structures. 4. Restraint of a large animal, usually a horse, with ropes and harnesses in a recumbent position. 5. In dentistry, a positive reproduction of the form of the tissues of the upper or lower jaw, which is made by the solidification of plaster, metal, etc., poured into an impression, and over which denture bases or other dental restorations may be fabricated. [M.E. kasten, fr. O.Norse kasta]
bacterial c. a c. in the urine composed of bacteria.
blood c. a c. usually formed in renal tubules, but may occur in bronchioles; consists of inspissated material that includes various elements of blood (i.e., erythrocytes, leukocytes, fibrin, and so on), resulting from bleeding into the glomerulus or tubule, or into the alveolus or bronchiole.
coma c. a renal c. of strongly refracting granules said to be indicative of imminent coma in diabetes.Külz's cylinder;
decidual c. a mold of the interior of the uterus formed of the exfoliated mucous membrane in cases of extrauterine gestation.
dental c. a positive likeness of a part or parts of the oral cavity.
diagnostic c. a positive replica of the form of the teeth and tissues made from an impression.
epithelial c. a c. that contains epithelial cells and their remnants; occurs most frequently in renal tubules and urine as a marker for renal tubular necrosis.
false c. an elongated, ribbon-like mucous thread with poorly defined edges and pointed or split ends, often confused with a true urinary c.cylindroid, mucous c., pseudocast, spurious c;
fatty c. a renal or urinary c. consisting largely of fat globules; those containing doubly refractile bodies (composed of cholesterol) are found in the nephrotic syndrome.
fibrinous c. a yellow c. that somewhat resembles a waxy c.; more likely to occur in the urine of certain patients with acute nephritis.
granular c. a relatively dark, dense urinary c. of coarsely or finely particulate cellular debris and other proteinaceous material, frequently seen in chronic renal disease but also in the recovery phase of acute renal failure. See also waxy c.
hair c. a c. composed of parakeratotic scales attached to scalp hair but freely movable up and down the hair shaft; found in scaling dermatitis of the scalp, including dandruff, psoriasis, and seborrheic dermatitis.pseudonit;
halo c. a c. applied to the shoulders in which metal bars are set that extend over the head to a halo, from which traction may be applied to the head by means of tongs or a halter.
hyaline c. a relatively transparent renal c. composed of proteinaceous material derived from disintegration of cells; seen in patients with renal disease or transiently with exercise, fever, congestive heart failure, and diuretic therapy.
investment c. refractory c
master c. a replica of the prepared tooth surfaces, residual ridge areas, and/or other parts of the dental arch as reproduced from an impression.
mucous c. false c
red blood cell c. a urinary c. composed of a matrix containing red cells in various stages of degeneration and visibility, characteristic of glomerular disease or renal parenchymal cell c;
red cell c. red blood cell c
refractory c. a c. made of material that will withstand the high temperatures of metal casting or soldering without disintegrating.investment c;
renal c. any type of c. formed in a renal tubule, and found in the urine consisting of various materials, e.g., albumin, cells, c;
spurious c. false c
tube c. renal c
urinary c.'s c.'s discharged in the urine.
waxy c. a form of urinary c. consisting of homogeneous proteinaceous material that has a high refractive index, in contrast to the low refractive index of hyaline c.'s; waxy c.'s probably represent an advanced stage of the disintegrative process that results in coarsely and finely granular c.'s, and are usually indicative of oliguria or anuria.
white blood cell c. a urinary c. composed of polymorphonuclear leukocytes, characteristic of tubulointerstitial disease, especially pyelonephritis.
white cell c. a c. in the urine composed of white blood cells.


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