hyaline cast

hyaline cast,

a transparent cast composed of mucoprotein.

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hyaline

glassy; pellucid.

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hyaline body

see apoptotic 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.