Acute disseminated encephalomyelitis: current understanding and controversies
Nathan P Young1, Brian G Weinshenker, Claudia F Lucchinetti
1Department of Neurology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA.
Abstract:
Acute disseminated encephalomyelitis (ADEM) is an uncommon monophasic idiopathic inflammatory demyelinating disease. Available diagnostic criteria do not reliably distinguish it from first presentations of relapsing diseases such as multiple sclerosis (MS) and neuromyelitis optica (NMO). In this article, we review current concepts about ADEM and what distinguishes it from other idiopathic inflammatory demyelinating disease, and we highlight controversial aspects and diagnostic problems. We review pathological differences between ADEM and MS in terms of their utility in the diagnosis of ADEM. Finally, we present a practical approach for management of patients suspected of having ADEM when the diagnosis is uncertain.
Insights
Acute disseminated encephalomyelitis (ADEM) is a rare inflammatory brain condition. Differentiating ADEM from multiple sclerosis (MS) and neuromyelitis optica (NMO) is challenging due to overlapping symptoms and diagnostic criteria.
Area of Science:
- Neuroimmunology
- Neurology
- Demyelinating Diseases
Background:
- Acute disseminated encephalomyelitis (ADEM) is an uncommon inflammatory demyelinating disease.
- Current diagnostic criteria struggle to differentiate ADEM from initial presentations of relapsing conditions like multiple sclerosis (MS) and neuromyelitis optica (NMO).
Purpose of the Study:
- To review current understanding of ADEM.
- To clarify distinctions between ADEM and other idiopathic inflammatory demyelinating diseases.
- To address diagnostic challenges and controversies, including pathological differences with MS.
Main Methods:
- Review of current literature on ADEM.
- Analysis of pathological differences between ADEM and MS.
- Discussion of diagnostic criteria and clinical management strategies.
Main Results:
- Diagnostic criteria for ADEM are not consistently reliable in distinguishing it from MS and NMO.
- Pathological differences between ADEM and MS are being investigated for diagnostic utility.
- Uncertainty in ADEM diagnosis poses clinical management challenges.
Conclusions:
- Accurate diagnosis of ADEM is crucial but difficult, requiring careful consideration of clinical and pathological features.
- Further research is needed to refine diagnostic criteria and improve differentiation from other demyelinating diseases.
- A practical approach to managing patients with suspected ADEM when diagnosis is uncertain is presented.
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