SOX10 and Tietz syndrome: SOX10, MITF and EDNRB have also been associated with additional pigmentary disorders including peripheral demyelinating neuropathy (SOX10), Yeminite deaf-blind hypopigmentation syndrome (SOX10), Tietz syndrome (MITF), and albinism, black lock, cell migration disorder of neurocytes and deafness syndrome (EDNRB); but these are clearly more debilitating and involve multiple organ systems in a pattern not present in grey-morph SRWs [66].