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Published on: July 4, 2007
Metronidazole-induced encephalopathy in a patient with spondylodiscitis
Guilherme Martins1,2, Ângelo Dias1, Carla Guerreiro1,2
1Serviço de Imagiologia Neurológica, Unidade Local de Saúde Santa Maria, Lisboa, Portugal.
Introduction:
Metronidazole-induced encephalopathy is an uncommon but potentially severe complication of metronidazole treatment. Although the exact pathophysiology remains elusive, proposed hypotheses include RNA binding, neurotoxicity from free radicals, and modulation of neurotransmitter receptors. Most cases demonstrate improvement upon discontinuation of metronidazole, highlighting the importance of early recognition. Magnetic resonance imaging plays a critical role in diagnosing metronidazole-induced encephalopathy, with characteristic imaging findings frequently observed in the dentate nuclei and corpus callosum.
Case Summary:
A 63-year-old man treated with metronidazole for lumbar spondylodiscitis developed neurological symptoms consistent with metronidazole-induced encephalopathy.
Images:
Magnetic resonance imaging revealed characteristic bilateral hyperintense lesions in the cerebellar dentate nuclei, corpus callosum, and brainstem. Prompt recognition and discontinuation of metronidazole led to symptom resolution.
Conclusion:
This case underscores the importance of clinicians and radiologists being aware of this condition and emphasizes the pivotal role of magnetic resonance imagining in establishing the diagnosis.
Insights
Metronidazole-induced encephalopathy is a rare complication. Early recognition and MRI are key for diagnosis and treatment, leading to symptom resolution.
Area of Science:
- Neurology
- Radiology
Background:
- Metronidazole-induced encephalopathy (MIE) is a rare but severe complication of metronidazole therapy.
- Pathophysiology of MIE is not fully understood but may involve neurotoxicity.
- Early recognition and discontinuation of metronidazole are crucial for patient recovery.
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