Regression
Gene: CSTB
Myoclonic epilepsy of Unverricht and Lundborg is an autosomal recessive disorder characterized by onset of neurodegeneration between 6 and 13 years of age. It is typically progressive in adolescence, with dramatic worsening of myoclonus and ataxia in the first 6 years after onset. The disease stabilises in early adulthood, and myoclonus and ataxia may even improve, and there is minimal to no cognitive decline.
Note the most common causative allele is a dodecamer repeat in the promoter region. Missense variants have been reported, most commonly compound het with the repeat, except for p.Gly4Arg which has been reported in the homozygous state also.
Sources: Expert ReviewCreated: 28 Sep 2021, 4:53 a.m.
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
Epilepsy, progressive myoclonic 1A (Unverricht and Lundborg), MIM# 254800
Publications
Gene: cstb has been classified as Green List (High Evidence).
Gene: cstb has been classified as Green List (High Evidence).
Tag 5'UTR tag was added to gene: CSTB. Tag STR tag was added to gene: CSTB.
gene: CSTB was added gene: CSTB was added to Regression. Sources: Expert Review Mode of inheritance for gene: CSTB was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CSTB were set to 9012407; 9054946 Phenotypes for gene: CSTB were set to Epilepsy, progressive myoclonic 1A (Unverricht and Lundborg), MIM# 254800 Review for gene: CSTB was set to GREEN