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Intern Med. 2013;52(4):503-6. Epub 2013 Feb 15.

Early involvement of the corpus callosum in a patient with hereditary diffuse leukoencephalopathy with spheroids carrying the de novo K793T mutation of CSF1R.

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  • 1Department of Medicine (Neurology and Rheumatology), Shinshu University School of Medicine, Japan.


We herein report the case of a 41-year-old Japanese man with hereditary diffuse leukoencephalopathy with spheroids (HDLS) who carried the de novo K793T mutation in the colony-stimulating factor 1 receptor gene (CSF1R). He showed a gradual decline of his cognitive and mental functions over the following six months. On brain MRI, a thin corpus callosum with T2- and FLAIR-high signal intensity in the splenium was conspicuous, whereas cerebral deep and periventricular white matter lesions were mild. We propose that a diagnosis of HDLS should be considered in patients with presenile dementia presenting with corpus callosum lesions on MRI, even in cases with a lack of any apparent family history.

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