Acute Disseminated Encephalomyelitis: A Gray Distinction.

Area of Science:

• Neurology
• Immunology
• Pediatrics

Background:

• Acute disseminated encephalomyelitis (ADEM) is an immune-mediated inflammatory demyelinating syndrome.
• ADEM predominantly affects the white matter of the central nervous system.

Observation:

• A three-year-old boy presented with symptoms suggestive of ADEM, but initial brain imaging revealed abnormalities exclusively in the deep gray matter, with no white matter involvement.
• The patient experienced a fluctuating clinical course.
• Repeat imaging performed one week later showed the development of characteristic white matter lesions, consistent with ADEM.

Findings:

• The case demonstrates that isolated deep gray matter involvement can be an initial manifestation of ADEM.
• This presentation preceded the development of typical white matter lesions in the patient.
• Treatment with high-dose corticosteroids and intravenous immunoglobulin resulted in substantial clinical improvement.

Implications:

• Clinicians should consider ADEM in cases with initial isolated deep gray matter abnormalities, even without concurrent white matter lesions.
• Repeat neuroimaging is crucial for patients with clinical suspicion of ADEM but lacking characteristic initial imaging findings.
• This case highlights the importance of serial imaging in diagnosing ADEM and guiding timely therapeutic interventions.