_:vb50940340 "A nonsyndromic congenital nail disorder that is characterized by excessive longitudinal striations and numerous superficial pits on the nails, which have a distinctive rough, sand paper-like appearance."^^ . _:vb50940340 "url:https://pubmed.ncbi.nlm.nih.gov/26149975/"^^ . _:vb50940340 . _:vb50940340 . _:vb50940340 . _:vb50940340 .