Mild clinical presentation and prolonged survival of a patient with fumarase deficiency due to the combination of a known and a novel mutation in FH gene.

Abstract excerpt

Mutations in the FH gene cause the deficiency of the enzyme fumarase (fumarate hydratase, EC 4.2.1.2) which result in autosomal recessive fumaric aciduria in early childhood with failure to thrive, seizures, developmental delay, mental retardation, hypotonia and sometimes with polycythemia, leukopenia, and neutropenia. Many children with fumarate hydratase deficiency do not survive infancy or childhood; those...

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