Front | Back |
Intercellular edema, may cause microvesicles-microvesicles look like white round gaps within the epidermis-juicy papules that may produce water
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Spongiosis
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Thickening of the stratum corneum (no nucleus)
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Hyperkeratosis
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Hyperkeratosis but with nuclei conserved
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Parakeratosis (often occurs simultaneously with hyperkeratosis)
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Epidermal hyperplasia (stratum spinosum thickened)- the purple layer of the epidermis is deeper
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Acanthosis
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Thickening of ALL LAYERS of the skin with increased surface markings (wrinkles, lines in the skin)
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Lichenification
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Loss of desmosomal connection, keratinocytes round up and separatei.e. Pemphigus vulgaris-see this white spotted area within the epidermis layer (intraepidermal)
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Acantholysis
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Small, flat, non-palpable lesion-1 cm or less in diameter
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Macule
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A large macule-flat, non-palpable (you can't feel it if you run your hand over it)
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Patch
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Palpable lesion-elevated above skin surface-larger than 1 cm
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Plaque
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Small, circumscribed, palpable lesion-up to 1 cm in diameter-like a red currant
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Papule
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Elevated, palpable and firm-circumscribed-larger than 1 cm-thicker/deeper than a papule or plaque-like a red grape
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Nodule
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Superficial, elevated lesion that contains purulent fluid (pus)i.e. acne, pustular psoriasis-like a cracked egg
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Pustule
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Elevated lesion that contains clear fluid-small blister up to 1 cm in diameter
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Vesicle
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Large blister greater than 1 cm in diameter (a large vesicle)-elevated lesion that contains clear fluid
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Bulla
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Straight line (Obviously straight)
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Linear arrangement
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