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Neuropathological spectrum of Rasmussen encephalitis
Prabal Deb1, Mehar Chand Sharma, Shailesh Gaikwad
1Department of Pathology, All India Institute of Medical Sciences, New Delhi, India.
Neurology India
|July 13, 2005
Summary
Rasmussen encephalitis (RE) is a rare neurological disorder characterized by inflammation and progressive brain damage. This study details the neuropathological findings in four RE cases, highlighting inflammation severity as a potential prognostic indicator.
Area of Science:
- Neurology
- Neuroscience
- Pathology
Background:
- Rasmussen encephalitis (RE) is a chronic, idiopathic epileptic disorder.
- It presents with progressive neurological decline, focal seizures, cognitive impairment, and hemispheric atrophy.
Purpose of the Study:
- To document the neuropathological changes in Rasmussen encephalitis.
- To explore the disease's evolutionary mechanisms.
Main Methods:
- Histopathological evaluation of surgically obtained brain specimens from four RE patients (2002-2004).
- Analysis included H&E staining, immunohistochemistry for inflammatory infiltrates (CD3, CD68), and semiquantitative inflammation grading.
Main Results:
- All four patients exhibited progressive intractable epilepsy, with onset between 5-10 years; three male, one female.
- Histopathology revealed perivascular lymphocytic infiltrate, neuronal loss, microglial nodules, astrocytosis, and neuronophagia.
- T-cell infiltrates (CD3+) and microglial proliferation (CD68+) were observed, with inflammation severity inversely correlating with symptom duration.
Conclusions:
- Accurate histopathological evaluation and grading of RE lesions may aid in patient prognostication.