Megalencephalic leukoencephalopathy with cysts without MLC1 defect.

Abstract

Megalencephalic leukoencephalopathy with subcortical cysts (MLC) is an autosomal recessive disease characterized by early infantile macrocephaly and delayed motor and cognitive deterioration. Magnetic resonance imaging (MRI) shows diffusely abnormal and swollen cerebral white matter and subcortical cysts. On follow-up, atrophy ensues. Approximately 80% of MLC patients have mutations in MLC1. We report 16 MLC patients without MLC1 mutations. Eight retained the classical clinical and MRI phenotype. The other 8 showed major MRI improvement. They lacked motor decline. Five had normal intelligence; 3 displayed cognitive deficiency. In conclusion, 2 phenotypes can be distinguished among the non-MLC1 mutated MLC patients: a classical and a benign phenotype.

• Authors: Marjo S van der Knaap, Vincent Lai, Wolfgang Köhler, Mustafa A Salih, Maria-José Fonseca, Tim A Benke, Callum Wilson, Parul Jayakar, Marjo-riitta Aine, Lina Dom, Bryan Lynch, Rozalia Kálmánchey, Peter Pietsch, Ab Errami, Gert C Scheper
• Journal: Annals of neurology (Ann Neurol) Vol. 67 Issue 6 Pg. 834-7 (Jun 2010) ISSN: 1531-8249 [Electronic] United States
• PMID: 20517947 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• MLC1 protein, human
• Membrane Proteins

Topics

• Adolescent
• Adult
• Brain Diseases (complications, pathology)
• Child
• Cysts (complications, genetics)
• DNA Mutational Analysis
• Female
• Follow-Up Studies
• Humans
• Leukoencephalopathies (complications, genetics, pathology)
• Magnetic Resonance Imaging (methods)
• Male
• Membrane Proteins (genetics)
• Mutation (genetics)
• Retrospective Studies
• Young Adult