Nail Disorder, Nonsyndromic Congenital, 9, also known as nail dysplasia, is related to deafness, onychodystrophy, osteodystrophy, impaired intellectual development, and seizures syndrome and chand syndrome, and has symptoms including nail bed hemorrhage and koilonychia. An important gene associated with Nail Disorder, Nonsyndromic Congenital, 9 is ARID1B (AT-Rich Interaction Domain 1B), and among its related pathways/superpathways is Assembly of the pre-replicative complex. Affiliated tissues include skin and bone marrow, and related phenotypes are absent toenail and onycholysis of distal fingernails