Abstract
We describe a 34-year-old man with hypomyelination, hypogonadotropic hypogonadism, ataxia, and myopia without hypodontia. He was born to non-consanguineous parents, and had an elder brother who showed a similar phenotype. Laboratory studies demonstrated low level of LH, FSH and testosterone. MRI showed hypomyelination, atrophy of the cerebellum and the hypoplastic corpus callosum. Homozygous missensze mutation c.2350G>A (p.Gly784Ser) was found in POLR3A,which codes for the largest subunit of RNA polymerase III. Since PolIII-related leukodystrophies shows various combination of neurologic and non-neurologic features, additional reports will help to confirm the mechanism of this disease.
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