Related Experiment Video
Updated: Aug 9, 2026

Induction and Clinical Scoring of Chronic-Relapsing Experimental Autoimmune Encephalomyelitis
Published on: July 4, 2007
[Acute disseminated encephalomyelitis in children]
1Servicio de Neurología Pediátrica, Hospital Luis Calvo Mackenna, Santiagode, Chile. ricardoerazo@yahoo.com
Insights
Acute disseminated encephalomyelitis (ADEM) is an immune-mediated inflammatory disease usually affecting children after infection. Most patients experience a good outcome, but long-term follow-up is crucial for diagnosis.
Area of Science:
- Neurology
- Immunology
- Pediatrics
Context:
- Acute disseminated encephalomyelitis (ADEM) is an immune-mediated inflammatory-demyelinating disease.
- ADEM typically follows an infection or vaccination and is more common in children.
- This review synthesizes data from the last decade, including a local cohort of 42 patients.
Purpose:
- To review clinical presentation, diagnostic methods, treatment strategies, and prognosis of ADEM.
- To provide insights based on recent literature and clinical experience.
- To highlight the diagnostic challenges and therapeutic approaches for ADEM.
Summary:
- ADEM presents 2-30 days post-infection with neurological symptoms like altered consciousness (50-60%) and motor dysfunction (80-90%).
- Magnetic resonance imaging is key for diagnosis, though clinico-neuroimaging discrepancies can occur.
- Steroids are the primary treatment, effective in ~90% of cases; mortality is low (0-7%), with sequelae in 10-20%.
Impact:
- ADEM is typically a monophasic demyelinating condition with a favorable prognosis.
- Distinguishing ADEM from multiple sclerosis is important due to recurrence potential (10-30%).
- Definitive diagnosis of ADEM relies on long-term patient follow-up.
Aim:
Acute disseminated encephalomyelitis (ADEM) is an immune-mediated inflammatory-demyelinating disease, which usually follows an infection or vaccination. It is more frequent in children. In this paper, I will review clinical, diagnosis, treatment, and prognosis data, based on last 10 years papers, including our experience with 42 patients studied at Calvo Mackenna Hospital and German Clinic of Santiago de Chile, Chile.
Development:
ADEM symptoms present 2 to 30 days after viral or bacterial infection. There is a slight male predominance (1,3:1). The clinical picture is characterized by multiple symptoms. Prominent findings are altered level of consciousness in 50-60% of patients, and motor system dysfunction in 80-90%. Spinal cord dysfunction occurs in 20-25% of children. Optic neuritis (10-20%) is usually bilateral. Magnetic resonance imaging is the gold standard to detect typical white matter lesions, which suggest ADEM diagnosis, but a clinico-neuroimaging gap may occurs. Steroids are the first choice for treatment. In practice, they seem to be useful in up to 90% of patients. Recurrences occur in 10-30% of cases, and raise a differential diagnosis with multiple sclerosis. Mortality is as low as 0-7%. Sequelae are seen in 10-20% of patients.
Conclusions:
ADEM is a demyelinating condition, usually with a monophasic course and good outcome. The only way to confirm a definite diagnosis is long-term follow-up.
Related Concept Videos
Encephalitis l: Introduction
Encephalitis ll: Pathophysiology
Arboviral Encephalitis
Rocky Mountain Spotted Fever
Viral Meningitis
Poliomyelitis

