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Hereditary spastic paraplegia with dementia
1Department of Psychological Medicine, Royal Hobart Hospital, Tasmania.
The Australian and New Zealand Journal of Psychiatry
|December 1, 1995
Summary
This study reports the first case of hereditary spastic paraplegia (HSP) with dementia in a Fijian Indian family. The findings suggest HSP may be a more common cause of early-onset dementia than previously thought.
Area of Science:
- Neurology
- Genetics
Background:
- Hereditary spastic paraplegia (HSP) is a rare group of inherited neurological disorders.
- HSP with dementia is exceptionally rare, with limited documented cases.
Observation:
- A Fijian Indian family with three affected individuals in a sibship of seven was studied over three years.
- Symptoms included cognitive decline, ambulation difficulties, dysarthria, and spastic paraplegia, appearing by adolescence.
- One individual experienced an episode of hypomanic behavior.
Findings:
- The affected individuals presented with a consistent pattern of progressive neurological and cognitive decline.
- Onset of symptoms occurred in early childhood, with significant disability by late teens.
- The non-consanguineous parents were asymptomatic, suggesting a de novo mutation or recessive inheritance pattern.
Implications:
- Hereditary spastic paraplegia (HSP) with dementia may be underdiagnosed as a cause of early-onset cognitive impairment.
- Further research is needed to understand the genetic basis and prevalence of HSP with dementia.
- Clinical suspicion and family history are crucial for diagnosing this rare condition.