Differences of Sex Development

Gene: TWNK

Green List (high evidence)

Perrault syndrome-5 (PRLTS5) is an autosomal recessive disorder characterized by progressive ataxia, axonal neuropathy, hyporeflexia, and abnormal eye movements, accompanied by progressive hearing loss and ovarian dysgenesis.

PMID: 25355836: 4 women from 2 unrelated families with Perrault syndrome-5.
2 sisters in each family presented with primary amenorrhea, lack of secondary sexual characteristics, and gonadal dysgenesis; 2 sisters in 1 family showed streak ovaries. Three of the 4 girls had onset of sensorineural hearing loss at 7 to 8 years of age; the fourth had onset of hearing loss at age 13. All 4 patients developed neurologic involvement in the second or third decades, with features including ataxia, nystagmus, hyporeflexia, and sensory axonal neuropathy with distal sensory impairment. WES identified compound heterozygous variants in each family, but functional studies of the variants were not performed.

PMID: 31852434: female with severe bilateral hypoacusis, severe ataxia, polyneuropathy, lower limb spastic paraparesis with pyramidal signs, and gonadal dysgenesis, and compound heterozygous variants in TWNK gene (but functional studies of the variants were not performed).

PMID: 31455392: 3 siblings from one family with childhood-onset bilateral sensorineural hearing impairment, neurological signs (spinocerebellar ataxia, polyneuropathy), and gonadal dysfunction with early cessation of menses in the 2 females. WES identified compound heterozygous pathogenic mutations in the TWNK gene, which segregated with disease.
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Sources: Literature

Created: 5 Dec 2024, 2:45 a.m.

Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal

Phenotypes
Perrault syndrome 5; MIM# 616138

Publications

• PMID: 25355836, 31852434, 31455392