hyaline cast


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hy·a·line cast

a relatively transparent renal cast seen in the urine and 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.

hyaline cast

a transparent cast composed of mucoprotein.

hy·a·line cast

(hīă-lēn kast)
Relatively transparent renal cast seen in urine; 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.
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HYALINE CAST: (Orig. mag. ×400)

hyaline cast

The most common form of cast found in the urine, transparent, pale, and having homogeneous rounded ends. It may be a benign finding, or may be present in fevers, stress, kidney disease, or unchecked hypertension.
illustration
See also: cast

hyaline

glassy; pellucid.

hyaline body
hyaline cartilage
see hyaline cartilage.
hyaline cast
see urinary cast.
hyaline degeneration
see hyaline degeneration.
hyaline globules
composed of fibrin degradation products these contribute to the formation of microthrombi. Called also shock bodies.
hyaline membrane
composed of fibrin and cell debris, this membrane lines the alveoli when there has been severe damage to the alveolar epithelium. See also hyaline membrane (3).
hyaline membrane disease
a disorder of newborn animals, most commonly foals, characterized by the formation of a hyalin-like membrane lining the terminal respiratory passages. Neonates with this disease do not secrete adequate quantities of surfactant, which is secreted by type II alveolar epithelial cells, and decreases the surface tension of the fluids lining the alveoli and bronchioles. When the surface tension is kept low, air can pass through the fluids and into the alveoli. If the surface tension is not decreased by adequate supplies of surfactant, the alveoli cannot fill with air and there is partial or complete collapse of the lung (atelectasis). Thus the foal with hyaline membrane disease suffers from respiratory embarrassment with severe dyspnea. See also neonatal maladjustment syndrome.
References in periodicals archive ?
The instrument is capable of differentiating erythrocytes, leukocytes, hyaline casts, unclassified casts, epithelial cells, bacteria, yeast, crystals, mucus, sperm, and amorphous substances.
History and Physical Examination * Subjective History of arthralgias, myalgias, fatigue, oral ulcers, photosensitivity rash * Objective Malar rash, discoid rash, anemia, edema, hematuria, nephrotic syndrome presentation Laboratory Data * Serologic Positive ANA titer (>1:160-1:320) Positive Anti-dsDNA titer Positive Anti-Sm titer Positive Anti-phospholipid titer Decreased complement protein levels (C3, C4) * Urinalysis Proteinuria, albuminuria, leukocyturia, hematuria, granular casts, hyaline casts, red blood cell casts, fatty casts, oval fat bodies * Other renal abnormalities Decreased creatinine clearance, decreased glomerular filtration rate, elevated serum creatinine Renal Biopsy Used as definitive diagnosis and for determining WHO classification (see Table 2)
No increase from the background value of 63% (procedure 5) was seen in preservation of hyaline casts by any procedure.
In visual microscopy, most of the hyaline casts were preserved only partially despite the various preservation procedures (Table 3).
In addition, it is difficult to obtain adequate brightfield photomicrographs of urine sediment structures that have low contrast, such as hyaline casts and bacteria.
Of the remaining 3%, positive sediment findings of hyaline casts, a rare granular cast, bacteria, or a few PMNs (polymorphonuclear leukocytes) were found with negative reagent-strip results.
Urinalysis was remarkable for occasional squamous epithelial cells and hyaline casts, a glucose >2.