Acute demyelinating events with rhombencephalitis: a high-risk subgroup in children

Area of Science:

• Pediatric Neurology
• Neuroimmunology
• Neuroimaging

Background:

• Acute, acquired central nervous system demyelination in childhood presents with diverse clinical phenotypes.
• The location of demyelination and presence of encephalopathy significantly influence the clinical presentation.
• Posterior fossa involvement occurs in over one-third of childhood cases.

Observation:

• This report details four pediatric cases with cerebellar involvement and significant posterior fossa mass effect on CT and MRI.
• These children exhibited substantial cerebellar and brainstem swelling, a condition termed rhombencephalitis.
• Distinguishing this specific subgroup clinically from other acute demyelinating events at initial presentation is difficult.

Findings:

• Posterior fossa rhombencephalitis in children can mimic other acute demyelinating disorders.
• Mass effect and swelling in the cerebellum and brainstem are key radiological features.
• Clinical presentation alone may not be sufficient for early diagnosis.

Implications:

• Early recognition of posterior fossa rhombencephalitis is crucial for appropriate management.
• Advanced neuroimaging (CT and MRI) plays a vital role in diagnosis.
• Further research is needed to differentiate rhombencephalitis from other demyelinating conditions in children.