?:definition
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A type of isolated punctate hereditary palmoplantar keratoderma with characteristics of multiple asymptomatic 1 to 2 mm-long, firm, hyperkeratotic projections (spiny keratosis) on the palms, soles and digits (typically confined to their volar and/or lateral aspects). Histopathologically compact columnar parakeratosis over hypo or agranular epidermis is observed.
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