| Flat, different color, any size |
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| Elevated solid area less than or equal to 5 mm |
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| Elevated solid area greater than 5mm |
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| Elevated solid area flat topped and greater than 5mm |
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| Fluid-filled raised area less than or equal to 5mm |
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| Fluid-filled raised area greater than 5mm |
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| Smooth, slightly raised redder or paler area |
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| Kind of skin rash notable for pale red, raised, itchy bumps. |
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| Small elevation of the skin containing cloudy or purulent material |
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| Dry or greasy laminated masses of keratin that represent thickened stratum corneum |
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| Epidermal thickening characterized by visible and palpable thickening of the skin with accentuated skin markings |
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| Hyperplasia mainly in stratum spinosum |
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| Disruption of the intercellular connections between keratinocytes |
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| Linear pattern of melanocyte proliferation |
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| Hyperplasia of the papillary dermis |
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| Complete loss of epidermis, plus or minus a defect in underlying dermis and subcutis |
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| Incomplete loss of epidermis |
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| Thickening of the stratum corneum, often associated with a qualitative abnormality of the keratin |
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| Keratinization characterized by the retention of nuclei in the stratum corneum |
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