MRPS7 and Perrault syndrome: However, bi-allelic variants in other genes, including RMND1 (MIM: 614917), PEX6 (MIM: 601498), MRPS7 (MIM: 611974), and MRPL50 (MIM: 611854),16,17,18,19 have been identified in individuals with some features of Perrault syndrome; a blended phenotype accounts for some diagnoses.20