MRI findings in subacute sclerosing panencephalitis

Area of Science:

• Neurology
• Radiology
• Neuroimaging

Background:

• Subacute sclerosing panencephalitis (SSPE) is a rare, progressive neurological disorder.
• Understanding the characteristic MRI findings is crucial for diagnosis and management.

Purpose of the Study:

• To describe the spectrum of MRI findings in patients with SSPE.
• To correlate imaging findings with clinical status.

Main Methods:

• Retrospective analysis of 34 MRI studies from 26 patients diagnosed with SSPE.
• Detailed evaluation of lesion location, signal intensity, and enhancement patterns on T2-weighted and contrast-enhanced images.

Main Results:

• High signal intensity T2-weighted lesions in periventricular and subcortical white matter were most common.
• Lesions typically progressed from cortex-subcortical to periventricular white matter involvement with diffuse cerebral atrophy.
• Pial/parenchymal enhancement, mass effect, and corpus callosum involvement were observed; basal ganglia/brainstem lesions were rare.
• Cortical/subcortical lesions showed some clinical correlation, but periventricular lesions and atrophy did not consistently reflect neurologic status.

Conclusions:

• MRI is essential for diagnosing SSPE, showing characteristic white matter changes and progression.
• The lack of consistent correlation between advanced imaging findings and clinical status highlights the complexity of SSPE progression.