Mondo Description Any frontotemporal dementia with motor neuron disease in which the cause of the disease is a mutation in the C9orf72 gene.

Uniprot Description An autosomal dominant neurodegenerative disorder characterized by adult onset of frontotemporal dementia and/or amyotrophic lateral sclerosis in an affected individual. There is high intrafamilial variation. Frontotemporal dementia is characterized by frontal and temporal lobe atrophy associated with neuronal loss, gliosis, and dementia. Patients exhibit progressive changes in social, behavioral, and/or language function. Amyotrophic lateral sclerosis is characterized by the death of motor neurons in the brain, brainstem, and spinal cord, resulting in fatal paralysis.

Disease Ontology Description An amyotrophic lateral sclerosis that has material basis in mutation in the C9ORF72 gene on chromosome 9. It is characterized by adult onset of either frontotemporal dementia and/or amyotrophic lateral sclerosis.