Term Name:	nonsyndromic congenital nail disorder 4
Synonyms:	anonychia congenita
Definition:	A nonsyndromic congenital nail disorder that is characterized by complete absence or severe hypoplasia of all fingernails and toenails without significant bone anomalies, and that has_material_basis_in homozygous or compound heterozygous mutation in the R-spondin-4 gene on chromosome 20p13.
Ontology:	Human Disease [DOID:0080082]   ( DOID:0080082 )