|LETTER TO THE EDITOR
|Year : 2019 | Volume
| Issue : 4 | Page : 231-232
Vanishing splenium of corpus callosum hyperintensity in a case of tuberculous meningitis
RS Jain, Divya Goel
Department of Neurology, SMS, Jaipur, Rajasthan, India
|Date of Submission||10-Sep-2019|
|Date of Decision||30-Sep-2019|
|Date of Acceptance||02-Oct-2019|
|Date of Web Publication||06-Nov-2019|
Dr. Divya Goel
4Ba19, Jawahar Nagar, Jaipur - 302 004, Rajasthan
Source of Support: None, Conflict of Interest: None
|How to cite this article:|
Jain R S, Goel D. Vanishing splenium of corpus callosum hyperintensity in a case of tuberculous meningitis. Indian J Med Spec 2019;10:231-2
|How to cite this URL:|
Jain R S, Goel D. Vanishing splenium of corpus callosum hyperintensity in a case of tuberculous meningitis. Indian J Med Spec [serial online] 2019 [cited 2020 Jan 21];10:231-2. Available from: http://www.ijms.in/text.asp?2019/10/4/231/270426
A 35-years-old female presented with 15 days' history of moderate-to-high grade fever, headache, vomiting, and altered behavior in the form of occasional irrelevant talks. On examination, neck stiffness and bilateral papilledema were noted. Magnetic resonance imaging (MRI) brain with contrast revealed a hyperintensity in splenium of corpus callosum with diffusion restriction [Figure 1] and [Figure 2]. Cerebrospinal fluid examination showed 260 cells with lymphocytic predominance (95%), raised proteins (254 mg/dl), and low sugar (22 mg/dl) indicative of tuberculous meningitis. The patient was started on antitubercular therapy (HRZES regimen) with injectable steroids (injection dexamethasone 4 mg tid). She showed improvement in her symptoms but developed intermittent vertigo for which her MRI brain was repeated after 6 days, which showed resolution of the corpus callosal hyperintensity [Figure 3] and [Figure 4]. Injection streptomycin was withheld after which her vertigo subsided. The patient became asymptomatic in the next 4 days and was discharged on antitubercular therapy and tapering doses of oral steroids (tablet dexamethasone 4 mg tid with a weekly taper).
|Figure 1: Magnetic resonance imaging brain diffusion-weighted imaging axial image shows diffusion restriction in the splenium of the corpus callosum with corresponding apparent diffusion coefficient fall|
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|Figure 2: Magnetic resonance imaging brain T2 axial image shows well-defined hyperintense lesion in the splenium of the corpus callosum|
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|Figure 3: Magnetic resonance imaging brain diffusion-weighted imaging axial image shows resolution of diffusion restriction in the splenium of the corpus callosum|
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|Figure 4: Magnetic resonance imaging brain T2 axial image shows resolution of hyperintense lesion in the splenium of the corpus callosum|
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The lesions in the splenium of the corpus callosum supervene only rarely in tuberculous meningitis. Hirotani et al. reported a case of tuberculous meningitis with abnormal signal intensities in splenium, internal capsule, and basal ganglia which resolved after a few days of therapy. Kimura et al. reported reversible hyperintense lesions in white matter and splenium of the corpus callosum in a case of influenza-associated encephalitis. Jain et al., in his case report, found a vanishing splenial lesion presenting as alexia with dysgraphia. The exact pathogenesis of the splenial lesion in the corpus callosum in this case of tuberculous meningitis is uncertain. The reversible lesion in the splenium of the corpus callosum is postulated to be caused by an increase in cytokines such as interleukin-6, interleukin-10, and intramyelinic edema. These raised inflammatory cytokines decrease following treatment of the tuberculous meningitis, with anti-inflammatory action of steroids, resulting in the resolution of the intramyelinic edema. This explains why the lesion in the splenium of the corpus callosum in tuberculous meningitis is only transient, as seen in this patient. To conclude, isolated vanishing splenial hyperintensity may be seen in a case of tuberculous meningitis, is an uncommonly documented entity, and carries a good prognosis with routine management.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
| References|| |
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[Figure 1], [Figure 2], [Figure 3], [Figure 4]