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Macro. Terms, Skin

Pathology, Basis of Disease-- Skin, Ch. 26

QuestionAnswer
macule circumscribed area of any size characterized by its flatness + usually distinguished from surrounding skin by its coloration.
papule elevated, solid area that's 5 mm or less across
nodule elevated, solid area that's greater than 5mm across
plaque elevated, flat-topped area that's usually greater than 5 mm across
vesicle fluis-filled, raised area that's 5 mm or less across
bulla fluid-filled, raised area that's greater than 5 mm across
blister common term used for a vesicle or bulla
pustule discrete, pus-filled, raised area
wheal itchy, transient, elevated area w/ variable blanching and erythema formed as the result of dermal edema
scale dry, platelike excrescense; usually the result of imperfect cornification
lichenification thickened + rough skin characterized by prominent skin markings; usually the result of repeated rubbing in susceptible persons.
excoriation a traumatic lesion characterized by breakage of the epidermis, causing a raw linear area(a deep scratch). Such lesions are often self-induced.
onycholysis loss of integrity of the nail substance.
Created by: hcmeek