Juvenile progressive dystonia: a new phenotype of GM2 gangliosidosis.

Abstract:

:A 10-year-old boy developed progressive dystonia and dementia. His symptoms had begun at age 2 1/2 years, and he had been unable to walk by 8 years. At age 10 he was severely dystonic, unable to use his hands to feed himself, and almost anarthric . He had dysphagia and urinary incontinence, and functioned at a 4-year-old level of mental development. The mean percentages of beta-hexosaminidase A measured in serum, leukocytes, and fibroblasts by the heat denaturation method, each on three separate assays, were 5.9, 9.8, and 13.0%, respectively. These values are higher than in Tay-Sachs disease but are similar to levels seen in late-onset or adult cases of GM2 gangliosidosis. This patient appears to represent a new phenotype of juvenile GM2 gangliosidosis having dystonia as the dominant symptom.

journal_name

Ann Neurol

journal_title

Annals of neurology

authors

Meek D,Wolfe LS,Andermann E,Andermann F

doi

10.1002/ana.410150408

subject

Has Abstract

pub_date

1984-04-01 00:00:00

pages

348-52

issue

4

eissn

0364-5134

issn

1531-8249

journal_volume

15

pub_type

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