_:vb50940599 "A palmoplantar keratosis that is characterized by marked hyperkeratosis on the surface of palms and soles."^^ . _:vb50940599 . _:vb50940599 "url:https://www.ncbi.nlm.nih.gov/pubmed/7544663"^^ . _:vb50940599 . _:vb50940599 . _:vb50940599 . _:vb50940599 .