patch (pach)
patch [pach]
1. a small area differing from the rest of a surface.
2. a macule more than 3 or 4 cm in diameter.
Peyer's patches oval elevated patches of closely packed lymph follicles on the mucosa of the small intestines.
salmon patch see nevus flammeus.
Salmon Patch
A variably-sized macule on the skin or other surface —e.g., the retina—which has a salmon-coloured hue
patch [pach]
a small area differing from the rest of a surface.
Peyer's p's whitish, oval, elevated patches of closely packed lymph follicles in mucous and submucous layers of the small intestine.
salmon patch a salmon-colored nevus flammeus usually found over the eyelids, between the eyes, or on the forehead. It is the most common vascular lesion of infancy, found in 40 per cent of newborns, and usually fades in the first year of life. Called also nevus simplex.
patch test a type of skin test for hypersensitivity in which filter paper or gauze saturated with the substance in question is applied to the skin, usually on the forearm; a positive reaction is reddening or swelling at the site.
Patch test.
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