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Published on: July 24, 2016
Infectious lesions of the brain stem
1Department of Neurosurgery, University of Minnesota Hospital and Clinic, Minneapolis.
Abstract:
Infectious lesions of the brain stem are rare and include primarily abscess and encephalitis. The most common etiologic agents for abscess formation are Streptococcus sp., Staphylococcus sp., and M. tuberculosis. Encephalitis is associated most often with L. monocytogenes and herpes simplex virus infection. Classical brain stem syndromes are uncommon with brain stem infections, and CSF obstruction can be seen with neurocysticercosis. The diagnosis of these lesions has been greatly aided by CT and MR imaging. Microsurgery and stereotaxis are both appropriate techniques for the treatment of brain stem abscess that establish a diagnosis, identify the causative agent, and relieve mass effect on important neural structures. Symptoms of hydrocephalus should be treated with temporary or permanent CSF diversion. Viral involvement of the brain stem is usually self-limited, and improved antimicrobial therapy has contributed to a decrease in the morbidity and mortality of bacterial and parasitic infections. Although once believed to be uniformly fatal, infections of the brain stem have now been successfully treated for more than a decade.
Insights
Brain stem infections, including abscess and encephalitis, are rare but treatable. Advances in imaging and microsurgery have significantly improved outcomes for these serious central nervous system conditions.
Area of Science:
- Neurology
- Infectious Diseases
- Neurosurgery
Background:
- Infectious lesions of the brain stem, such as abscess and encephalitis, are uncommon neurological conditions.
- Common causes include Streptococcus sp., Staphylococcus sp., M. tuberculosis, Listeria monocytogenes, and herpes simplex virus.
Purpose of the Study:
- To review the diagnosis and treatment of infectious brain stem lesions.
- To highlight the impact of modern imaging and surgical techniques on patient outcomes.
Main Methods:
- Review of literature on brain stem infections.
- Discussion of diagnostic modalities including CT and MR imaging.
- Evaluation of surgical and antimicrobial treatment strategies.
Main Results:
- CT and MR imaging have greatly improved the diagnosis of brain stem lesions.
- Microsurgery and stereotaxis are effective for brain stem abscess treatment.
- Improved antimicrobial therapies have reduced morbidity and mortality.
Conclusions:
- Brain stem infections, once considered uniformly fatal, are now successfully treated.
- Prompt diagnosis and appropriate management, including CSF diversion for hydrocephalus, are crucial.
- Advances in neuroimaging and neurosurgical techniques have revolutionized patient care and prognosis.
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