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31 Cards in this Set

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Primary or secondary lesion and definition: Patch
Primary, Flat circumscribed skin discoloration that lacks surface elevation or depression > 0.5 cm in diameter
Primary or secondary lesion and definition: Macule
Primary, Flat circumscribed skin discoloration that lacks surface elevation or depression < 0.5 cm in diameter
Primary or secondary lesion and definition: Papule
Primary, Elevated solid lesion < 0.5 cm in diameter
Primary or secondary lesion and definition: Plaque
Primary, Elevated solid “confluence of papules” (>0.5 cm in diameter) that lacks a deep component
Primary or secondary lesion and definition: Nodule
Primary, Elevated solid lesion > 0.5 cm in diameter
Primary or secondary lesion and definition: Scale
Secondary, Thick flakes of dry, whitish material representing accumulations of stratum corneum due to hyperproliferation or increased cohesion of keratinocytes
Primary or secondary lesion and definition: Hyperkeratosis
Secondary, Accumulation of thickened stratum corneum which does not easily flake off
Primary or secondary lesion and definition: Crust
Secondary, Collection of dried secretions on the skin. Antecedent primary lesion is usually a vesicle, bulla, or pustule
Primary or secondary lesion and definition: Lichenification
Secondary, Thickening of the skin and accentuation or exaggeration of normal skin markings. Represents epidermal hyperplasia due to chronic rubbing.
Primary or secondary lesion and definition: Erosion
Secondary, Partial focal loss of epidermis which heals without scarring.
Primary or secondary lesion and definition: Excoriation
Secondary, Linear or angular erosion of epidermis due to scratching or picking
Primary or secondary lesion and definition: Ulcer
Secondary, Full-thickness focal loss of epidermis and dermis (and sometimes subcutis) which heals with scarring
Primary or secondary lesion and definition: Fissure
Secondary, Linear split or crack in epidermis and dermis with sharply defined walls
Primary or secondary lesion and definition: Petechiae
Primary, Extravasation of blood cells into the dermis < 0.5 cm in diameter
Primary or secondary lesion and definition: Scar
Secondary, Collection of new connective tissue. May be hypertrophic or atrophic. Smooth with lack of appendageal structures
Primary or secondary lesion and definition: Sclerosis
Secondary, Thickening of dermis which does not arise at the site of previous tissue injury
Primary or secondary lesion and definition: Telangiectasis
Secondary, Dilated superficial flood vessels that blanch with pressure
Primary or secondary lesion and definition: Purpura
Primary, Extravasation of blood cells into the dermis > 0.5 cm in diameter
Primary or secondary lesion and definition: Cyst
Primary, Elevated solid lesion > 0.5 cm in diameter containing fluid/semisolid material
Primary or secondary lesion and definition: Wheal
Primary, Firm, edematous plaque that is evanescent and pruritic
Primary or secondary lesion and definition: Vesicle
Primary, Elevated solid lesion < 0.5 cm in diameter containing clear fluid
Primary or secondary lesion and definition: Bulla
Primary, Elevated solid lesion > 0.5 cm in diameter containing clear fluid
Primary or secondary lesion and definition: Pustule
Primary, Elevated solid lesion < 0.5 cm in diameter containing purulent material
Primary or secondary lesion and definition: Comedo
Primary, Folliculocentric collection of sebum and keratin
Primary or secondary lesion and definition: Burrow
Primary, Narrow raised channel produced by a parasite
Primary or secondary lesion and definition: Tumor
Primary, Elevated solid lesion > 2 cm in diameter
Type of scale: Psoriasis
Example of micaceous scale
Type of scale: Pityriasis rosea
Example of collarette scale
Type of scale: Tinea versicolor
Example of fine or bran-like scale
Type of scale: X-linked recessive ichthyosis
Example of “dirty” brown scale
Type of scale: Porokeratosis
Example of cornoid lamella with “wall of China” appearance