PMC4286823_01
16-year-old boy presented with altered sensorium of 1 day duration diagnosed with eosinophilic meningitis caused by A. cantonensis. MR images, (a and b) axial T2 (c and d) axial FLAIR images, at the basal ganglia level demonstrate subtle scattered hyperintensities in the periventricular regions (white arrows). (e and f) Axial T1-weighted images do not show these features.
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F1
T1-weighted images [Figure 1].
16-year-old boy presented with altered sensorium of 1 day duration diagnosed with eosinophilic meningitis caused by A. cantonensis. (a-d) MR diffusion-weighted images show foci of restricted diffusion appearing bright (white arrows). (e and f) Apparent diffusion coefficient (ADC) series shows hypointense areas (white arrows).
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F2
The foci were more distinct on the diffusion-weighted images (DWI) as foci of restricted diffusion appearing bright on the DWI series and hypointense on the apparent diffusion coefficient (ADC) series [Figure 2]. These lesions showed subtle enhancement and associated meningeal enhancement on contrast administration [Figure 3]. There was no meningeal or ependymal enhancement.
16-year-old boy presented with altered sensorium of 1 day duration diagnosed with eosinophilic meningitis caused by
A. cantonensis. (a-d) MR post-gadolinium contrast-enhanced T1WI images show subtle meningeal enhancement (double black arrows) and faint enhancement of the lesions in the basal ganglia (single black arrow).
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F3
The foci were more distinct on the diffusion-weighted images (DWI) as foci of restricted diffusion appearing bright on the DWI series and hypointense on the apparent diffusion coefficient (ADC) series [Figure 2]. These lesions showed subtle enhancement and associated meningeal enhancement on contrast administration [Figure 3]. There was no meningeal or ependymal enhancement.
16-year-old boy presented with altered sensorium of 1 day duration diagnosed with eosinophilic meningitis caused by
A. cantonensis. (a-d) Images of the microscopic examination of wet mount of CSF x45 show third-stage larva of Angiostrongylus, knob-like tip (black arrow), rod-like structure (red arrow), intestine (asterisk), and terminal projection on the tip of the tail (blue arrow).
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F4
The CSF wet mount showed a larva which matched the larval form of A. cantonensis [Figure 4].