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Updated: May 21, 2026

Real-Time Fluorescent Measurement of Synaptic Functions in Models of Amyotrophic Lateral Sclerosis
Published on: July 16, 2021
Combined fulminant frontotemporal dementia and amyotrophic lateral sclerosis associated with an I113T SOD1 mutation
Jonathan S Katz1, Hans D Katzberg, Susan C Woolley
1Forbes Norris ALS/MND Research Center, California Pacific Medical Center, San Francisco, California, USA. katzjs@sutterhealth.org
Abstract:
Mutations in the gene for superoxide dismutase type 1 cause amyotrophic lateral sclerosis (ALS), but are not thought to be associated with frontotemporal dementia (FTD). A lack of detailed case reports is one reason, among others, for this skepticism. This case report comments on a patient with familial ALS caused by I113T mutation in the SOD1 gene presenting with progressive cognitive and behavioral decline two years before developing progressive motor degeneration. In conclusion, this case provides evidence that SOD1 mutations can be associated with FTD.
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