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1. any patch or flat area.
2. a superficial, solid, elevated skin lesion with a diameter equal to or greater than 1.0 cm (0.5 cm according to some authorities); see also papule.
3. dental plaque.
atheromatous plaque fibrous plaque.
dental plaque a dense, nonmineralized, highly organized biofilm of microbes, organic and inorganic material derived from the saliva, gingival crevicular fluid, and bacterial byproducts. It plays an important etiologic role in the development of dental caries and periodontal and gingival diseases; calcified plaque forms dental calculus.
fibrous plaque the lesion of atherosclerosis, a white to yellow area within the wall of an artery that causes the intimal surface to bulge into the lumen; it is composed of lipid, cell debris, smooth muscle cells, collagen, and, in older persons, calcium. Called also atheromatous plaque.
Hollenhorst p's atheromatous emboli containing cholesterol crystals in the retinal arterioles.
pleural p's opaque white plaques on the parietal pleura, visible radiographically in cases of asbestosis.
senile p's microscopic lesions composed of fragmented axon terminals and dendrites surrounding a core of amyloid seen in the cerebral cortex in Alzheimer's disease.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
a well-demarcated yellow area or swelling on the intimal surface of an artery; produced by intimal lipid deposit.
Farlex Partner Medical Dictionary © Farlex 2012