Deafness tends to occur before other neurologic signs, except in patients with very early onset [MISCELLANEOUS] Death usually due to respiratory failure [MISCELLANEOUS] Onset in infancy and third decade had been reported [MISCELLANEOUS] Caused by mutation in the solute carrier family 52 (riboflavin transporter), member 3 gene (SLC52A3, 613350.0001) [MOLECULAR BASIS] Progressive disorder [MISCELLANEOUS] Variable age at onset, most often in second decade [MISCELLANEOUS] Earlier onset is associated with more rapid progression [MISCELLANEOUS]
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