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Evaluation of cerebral biopsies for the diagnosis of dementia
C M Hulette1, N L Earl, B J Crain
1Department of Pathology, Duke University Medical Center, Durham, NC 27710.
Abstract:
To identify those patients most likely to benefit from a cerebral biopsy to diagnose dementia, we reviewed a series of 14 unselected biopsies performed during a 9-year period (1980 through 1989) at Duke University Medical Center, Durham, NC. Pathognomonic features allowed a definitive diagnosis in seven specimens. Nondiagnostic abnormalities but not diagnostic neuropathologic changes were seen in five additional specimens, and two specimens were normal. Creutzfeldt-Jakob disease was the most frequent diagnosis. One patient each was diagnosed as having Alzheimer's disease, diffuse Lewy body disease, adult-onset Niemann-Pick disease, and anaplastic astrocytoma. We conclude that a substantial proportion of patients presenting clinically with atypical dementia are likely to receive a definitive diagnosis from a cerebral biopsy. However, in those with coexisting hemiparesis, chorea, athetosis, or lower motor neuron signs, cerebral biopsies are less likely to be diagnostic.
Insights
Cerebral biopsy can definitively diagnose atypical dementia in many patients. However, it is less effective for those with neurological signs like hemiparesis or chorea.
Area of Science:
- Neurology
- Neurosurgery
Background:
- Dementia diagnosis can be challenging, especially in atypical presentations.
- Cerebral biopsy offers a direct method for neuropathological examination.
Purpose of the Study:
- To evaluate the diagnostic yield of cerebral biopsy in patients with dementia.
- To identify patient characteristics that predict successful biopsy diagnosis.
Main Methods:
- Retrospective review of 14 unselected cerebral biopsies performed between 1980-1989.
- Analysis of neuropathological findings and correlation with clinical presentation.
Main Results:
- Definitive diagnoses were achieved in 7 of 14 biopsies.
- Creutzfeldt-Jakob disease was the most common diagnosis.
- Biopsies were less diagnostic in patients with hemiparesis, chorea, or motor neuron signs.
Conclusions:
- Cerebral biopsy is a valuable tool for diagnosing atypical dementia.
- Clinical features such as hemiparesis, chorea, athetosis, or lower motor neuron signs reduce the likelihood of a diagnostic biopsy.