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Brain biopsy in dementia
J D Warren1, J M Schott, N C Fox
1Dementia Research Centre, Institute of Neurology, London, UK. jwarren@dementia.ion.ucl.ac.uk
Brain : a Journal of Neurology
|May 20, 2005
Summary
Brain biopsy aids dementia diagnosis, identifying conditions like Alzheimer's and Creutzfeldt-Jakob disease. While complications exist, it can guide treatment for treatable inflammatory disorders.
Area of Science:
- Neurology
- Neurosurgery
- Pathology
Background:
- The diagnostic utility of brain biopsy in dementia remains debated.
- Cerebral biopsies are invasive procedures with potential risks.
Purpose of the Study:
- To retrospectively analyze the diagnostic yield and complication rates of brain biopsies in dementia investigation.
- To identify predictors for diagnostic success and treatable conditions.
Main Methods:
- Retrospective analysis of 90 consecutive cerebral biopsies for dementia investigation (1989-2003).
- Biopsies involved full-thickness resection of frontal cortex, white matter, and leptomeninges.
- Analysis of diagnostic outcomes, complications, and correlation with clinical/laboratory findings.
Main Results:
- 57% of biopsies were diagnostic, with common findings including Alzheimer's disease (18%), Creutzfeldt-Jakob disease (12%), and inflammatory disorders (9%).
- Non-specific gliosis was the most frequent finding (37%) in non-diagnostic cases.
- Complications occurred in 11% (seizures, infections, hemorrhage), with no deaths or lasting sequelae. Biopsy information influenced treatment in 11% of cases.
Conclusions:
- Cerebral biopsy is valuable in dementia diagnosis, particularly when treatable inflammatory conditions are suspected.
- Elevated cerebrospinal fluid (CSF) cell count predicts treatable inflammatory processes.
- Specific clinical and laboratory features may help select patients for biopsy when other methods are inconclusive.
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