nail dysgenesis
Defective development of the nail.
http://purl.obolibrary.org/obo/UPHENO_0047407
http://purl.obolibrary.org/obo/HP_0002164
http://purl.obolibrary.org/obo/UPHENO_0047386
http://purl.obolibrary.org/obo/UPHENO_0088109