_:vb50951889 . _:vb50951889 "A keratosis characterized by abnormal thickening of the palms and the soles."^^ . _:vb50951889 "url:http://en.wikipedia.org/wiki/Palmoplantar_keratoderma"^^ . _:vb50951889 . _:vb50951889 . _:vb50951889 . _:vb50951889 .