Disorders with prominent posterior fossa involvement

Area of Science:

• Neurogenetics
• Neuroimaging
• Pediatric Neurology

Background:

• Inherited white matter disorders (IWMDs) are a heterogeneous group of genetic conditions affecting brain development and function.
• While many IWMDs present with non-specific clinical and MRI features, some exhibit distinct phenotypes.
• The posterior fossa is a critical brain region, and its involvement in IWMDs can provide diagnostic clues.

Purpose of the Study:

• To highlight the importance of MRI-based diagnostic strategies for inherited white matter disorders.
• To focus on IWMDs with prominent posterior fossa involvement and their specific MRI phenotypes.
• To guide the selection of candidate genes for genetic testing in resource-limited settings.

Main Methods:

• Review of clinical and neuroimaging (MRI) characteristics of inherited white matter disorders.
• Analysis of specific MRI phenotypes associated with posterior fossa involvement.
• Discussion of diagnostic algorithms integrating clinical, imaging, and genetic data.

Main Results:

• Distinct MRI findings, particularly in the posterior fossa, can significantly narrow down the differential diagnosis of IWMDs.
• Specific genetic disorders affecting the white matter show characteristic patterns of posterior fossa abnormalities on MRI.
• An MRI-guided approach can be highly effective in identifying potential causative genes.

Conclusions:

• Magnetic resonance imaging (MRI) is a crucial tool for diagnosing inherited white matter disorders, especially when posterior fossa involvement is evident.
• Recognizing specific MRI phenotypes associated with posterior fossa involvement can orient genetic investigations.
• This diagnostic strategy is particularly valuable in regions with limited access to comprehensive genetic testing.