Nail dysplasia is an idiopathic nail dystrophy, beginning in early childhood, and characterized by excessive longitudinal striations and loss of nail luster affecting all 20 nails. The disease is nonsyndromic congenital nail disorder 1 (Monarch Disease Ontology identifier MONDO_0008060). Also known as: FZD6 inherited isolated nail anomaly, inherited isolated nail anomaly caused by mutation in FZD6, nail disorder, nonsyndromic congenital, type 10, nonsyndromic congenital nail disorder 10, nonsyndromic congenital nail disorder type 1, nonsyndromic congenital nail disorder type 10, onychodystrophy totalis, twenty-nail dystrophy.