Ultrahigh-field imaging (7 Tesla) in DNET: Unmasking microstructural imaging characteristics - A case report

Area of Science:

• Neuroimaging
• Oncology
• Neurology

Background:

• Commercial ultrahigh-field 7 Tesla (T) MRI is approved for clinical brain imaging, including epilepsy and brain tumors.
• Higher magnetic field strength in MRI improves spatial resolution, signal-to-noise ratio, and contrast-to-noise ratio, enhancing anatomical detail and gray-white matter differentiation.
• Dysembryoplastic neuroepithelial tumors (DNETs) are rare, low-grade neoplasms typically affecting young patients with refractory epilepsy, characterized by distinct histological subtypes.

Purpose of the Study:

• To present a case study of a presumed dysembryoplastic neuroepithelial tumor (DNET) imaged with second-generation 7T MRI.
• To highlight the unprecedented level of detail 7T MRI provides regarding complex tumor architecture and its correlation with histopathological features.
• To review MRI patterns of DNETs and their correlation with histological subtypes and the epileptogenic zone.

Main Methods:

• Utilized second-generation 7 Tesla (T) MRI for imaging a presumed dysembryoplastic neuroepithelial tumor (DNET).
• Analyzed the detailed tumor architecture and its components as visualized by 7T MRI.
• Reviewed existing literature on MRI patterns of DNETs and their correlation with histopathology and epilepsy.

Main Results:

• 7T MRI revealed an unprecedented level of detail of the complex and intricate architecture of the presumed DNET.
• The detailed imaging insights correlated closely with the known histopathological features of DNETs.
• 7T images demonstrated superior lesion conspicuity and clearer boundaries compared to lower-field MRI, effectively defining the full extent of the lesion.

Conclusions:

• Ultrahigh-field 7T MRI offers significant advantages in visualizing complex brain tumor architecture, such as DNETs, with superior detail.
• Precise preoperative visualization of tumors and surrounding tissues is crucial for complete resection and recurrence prevention in DNET management.
• 7T MRI is increasingly important in epilepsy management, especially for cases requiring detailed structural analysis, despite its limited availability.