Overlapping neuropathological findings in an asymptomatic gene mutation carrier.

Hereditary spastic paraparesis (HSP) caused by mutations in the gene are autosomal-dominant inherited disorders characterized by weakness of lower extremities, spasticity and hyperreflexia. Some cases with cognitive decline have been repored. Herein we present an asymptomatic carrier of a gene mutation who developed an adult-onset cognitive decline, compatible with Alzheimer's disease with co-pathologies such as argyrophylic grain disease and cerebrovascular pathology.