. "DFN2"^^ . "DFNX1"^^ . "DOID:0111739"^^ . "OMIM:304500"^^ . "X-linked sensorineural congenital deafness 2"^^ . "An X-linked nonsyndromic deafness characterized by congenital profound sensorineural hearing loss in males and mild to moderate high-frequency hearing loss in heterozygous females that has_material_basis_in mutation in PRPS1 on chromosome Xq22.3."^^ . "disease_ontology"^^ . . . "X-linked deafness 1"^^ .