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Background Aquagenic palmoplantar keratoderma (APPK), also known as aquagenic wrinkling of the palms, is characterized by oedema of palms and/or soles, whitish papules, hyperwrinkling and sometimes pruritus or pain after water immersion. Its frequency in the general population is unknown. About 40 cases have been reported to date, including some among patients with cystic fibrosis (CF) or CF heterozygotes...
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