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Aquagenic keratoderma may be associated with a heterozygous mutation in the cystic fibrosis gene. Although the diagnosis is a clinical one, histopathology is useful and may reveal some characteristic diagnostic clues. Aquagenic pseudokeratoderma seems to be a more appropriate term to name it.

Our results demonstrate that PL is a skin disorder mediated by the effector cytotoxic T-cell population. The identification of PVB19 DNA in nine cases may be interpreted ambiguously: PVB19 as a true pathogen or as an innocent bystander.