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MR diagnosis of acute disseminated encephalomyelitis
Abstract:
High-field magnetic resonance (MR) imaging was performed in three patients with clinically diagnosed acute disseminated encephalomyelitis (ADEM). Contrast enhanced CT was normal in all cases. Magnetic resonance demonstrated multiple foci of demyelination in the brain stem, cerebrum, and cerebellum. Lesions were characteristic, in that they were relatively few in number, frequently present in the brain stem and posterior fossa, nonhemorrhagic, asymmetric, and easily correlated with clinical symptoms and signs. Follow-up MR in one patient who had clinically improved after steroid therapy showed marked resolution of previously documented lesions. Typical MR findings in combination with the appropriate clinical presentation can confirm the diagnosis of ADEM, obviate other more invasive diagnostic tests, identify the extent and sites of involvement, and follow response to therapy.
Insights
High-field magnetic resonance (MR) imaging is effective for diagnosing acute disseminated encephalomyelitis (ADEM). MR findings correlate with clinical symptoms and show lesion resolution after steroid therapy, aiding diagnosis and treatment monitoring.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Acute disseminated encephalomyelitis (ADEM) is an inflammatory demyelinating disease.
- Accurate diagnosis is crucial for appropriate management and prognosis.
Purpose of the Study:
- To evaluate the utility of high-field magnetic resonance (MR) imaging in diagnosing ADEM.
- To assess the characteristic MR findings in ADEM patients.
- To monitor treatment response using MR imaging.
Main Methods:
- High-field MR imaging was performed in three patients with clinically diagnosed ADEM.
- Contrast-enhanced CT scans were obtained for comparison.
- Follow-up MR imaging was conducted after steroid therapy in one patient.
Main Results:
- Contrast-enhanced CT was normal in all ADEM cases.
- MR imaging revealed multiple, characteristic demyelinating lesions in the brain stem, cerebrum, and cerebellum.
- Follow-up MR showed significant lesion resolution following steroid treatment.
Conclusions:
- High-field MR imaging is a valuable tool for diagnosing ADEM.
- Characteristic MR findings, combined with clinical presentation, can confirm ADEM diagnosis.
- MR imaging helps determine lesion extent and monitor therapeutic response.