FGF14 Repeat Expansion Testing for SCA27B Now Available!

An intronic GAA expansion in the FGF14 gene has recently been identified in several individuals with previously unexplained late-onset ataxia (PMID: 36516086, 36493768). The identification of this intronic expansion has led to the discovery of a new form of autosomal dominant hereditary ataxia, spinocerebellar ataxia type 27B (SCA27B). SCA27B is an autosomal dominant neurodegenerative disorder characterized by the onset of gait and appendicular ataxia in adulthood, usually around age 55 [MIM#620174]. About half of patients present with episodic features.

FGF14 Repeat Expansion Testing for SCA27B Now Available!

An intronic GAA expansion in the FGF14 gene has recently been identified in several individuals with previously unexplained late-onset ataxia (PMID: 36516086, 36493768). The identification of this intronic expansion has led to the discovery of a new form of autosomal dominant hereditary ataxia, spinocerebellar ataxia type 27B (SCA27B). SCA27B is an autosomal dominant neurodegenerative disorder characterized by the onset of gait and appendicular ataxia in adulthood, usually around age 55 [MIM#620174]. About half of patients present with episodic features.

RFC1 Repeat Expansion Testing for CANVAS/Spectrum Disorders Now Available!

Update August 8, 2022

Truncating variants in the RFC1 gene have been identified in patients with clinically defined CANVAS in the compound heterozygous state with a repeat expansion in the RFC1 gene.  We have identified seven such patients from five unrelated families (PMID 36289003).  Sequencing of the RFC1 gene is indicated in CANVAS patients heterozygous for an RFC1 repeat expansion.

Dyslipidemia and Hypercholesterolemia Panels Now Available!

We are pleased to announce we have added new panels for dyslipidemias and familial hypercholesterolemia to our testing menu! Dyslipidemias are a clinically and genetically heterogenous group of disorders associated with abnormal levels of lipids and lipoproteins, including increased or decreased levels of LDL or HDL cholesterol or increased levels of triglycerides. The most common subset of monogenic dyslipidemia is familial hypercholesterolemia (FH), which has an estimated prevalence of 1 in 200 in the Caucasian population.