Genotypic and phenotypic characteristics of juvenile/adult onset vanishing white matter: a series of 14 Chinese patients.

Abstract

Vanishing white matter (VWM) is one of the most prevalent leukoencephalopathies and is caused by recessive mutations in gene eIF2B1-5. The onset may vary from an antenatal disorder that is rapidly fatal to an adult-onset disorder with chronic progressive deterioration. Based on a comprehensive study of 14 juvenile/adult patients diagnosed in our department as well as a review of 71 previously reported cases of genetically confirmed juvenile/adult-onset VWM since 2001, we attempted to delineate the clinical symptoms, disease evolution, episodic aggravation, associated symptoms, MRI findings and genotypic characteristics of adult VWM. The onset age of neuropsychiatric symptoms was 23.4 ± 10.6years, and the mean follow-up time was 8.1 ± 4.8years. Major clinical symptoms included headache, epilepsy, cognitive decline, cerebellar ataxia, and urinary disturbances. Episodic aggravation was found in 42.9% of the patients in our series. Molecular studies revealed fourteen novel missense mutations. Diffuse abnormal signals characterized by T1-weighted hypointensity and T2-weighted hyperintensity were observed in the supratentorial white matter. The symmetrical leukoencephalopathy must be considered in patients of any age with premature ovarian failure or optic neuropathy. The VWM disease spectrum consists of characteristicimaging findings in combinationwith extremely wide variability in VWM patients.