title: What is your diagnosis? Pachyonychia congenita.
authors.affiliation: Department of Dermatology, Geisinger Medical Center, Danville, Pennsylvania, USA.
authors.forename: Dirk M
authors.initials: DM
authors.lastname: Elston
mesh_terms: D002648:Child; D003937:Diagnosis, Differential; D006801:Humans; D007645:Keratoderma, Palmoplantar / Q000175:diagnosis*; D008297:Male; D009260:Nail Diseases / Q000175:diagnosis*; D009264:Nails, Malformed / Q000473:pathology; D013577:Syndrome