_:vb50940359 "A nonsyndromic congenital nail disorder that is characterized by nails with longi- tudinal streaks, thinning of the nail plate, poorly developed or absent lunulae, along with variously disturbed formation of the nail plate leading to increased vulnerability of the free nail margins."^^ . _:vb50940359 . _:vb50940359 . _:vb50940359 "url:https://pubmed.ncbi.nlm.nih.gov/26149975/"^^ . _:vb50940359 . _:vb50940359 .