Imaging of malformations of cortical development

Area of Science:

• Neuroscience
• Radiology
• Neurology

Background:

• Malformations of cortical development (MCD) are a significant cause of epilepsy, particularly drug-resistant partial epilepsy (DRPE).
• Modern neuroimaging, especially Magnetic Resonance Imaging (MRI), has enhanced the diagnosis and surgical management of MCD.
• Focal cortical dysplasias (FCD) types I and II are specific MCD subtypes requiring precise diagnostic criteria.

Purpose of the Study:

• To review neuroimaging findings for FCD types I and II.
• To discuss the role of structural MRI, PET, MEG, and diffusion tensor imaging (DTI) in FCD diagnosis.
• To highlight advancements in identifying subtle FCD lesions.

Main Methods:

• Review of neuroimaging techniques including structural MRI, PET, co-registered PET/MRI, MEG, and DTI.
• Analysis of morphological MRI features specific to FCD types I and II.
• Evaluation of the utility of functional imaging and advanced diffusion techniques.

Main Results:

• High-resolution MRI aids in identifying MCD, guiding surgical treatment for DRPE.
• Subtle FCDs, previously undetected, are now recognizable with advanced MRI.
• PET, MEG, and DTI offer complementary information for FCD characterization.

Conclusions:

• Neuroimaging is crucial for diagnosing MCD and guiding epilepsy surgery.
• Continued research into advanced imaging modalities like DTI is essential for understanding FCD microstructure.
• Accurate FCD detection and characterization improve patient outcomes in epilepsy management.