case_images: PMC9519849_01
case_images: Initial MRI. (A) Axial MRI without contrast showing a hypointense signal on T1-weighted images in the right brainstem. (B) Intermediate signal on T2-weighted image surrounded by hyperintense signal of brain edema.
case_images: fneur-13-990998-g0001.jpg
case_images: PMC9519849_01_fneur-13-990998-g0001.jpg
case_images: F1
case_images: T1-weighted without contrast images revealed a hypointense mass lesion in the right brainstem (Figure 1A). T2-weighted images showed an intermediate signal with irregular and poorly defined borders, surrounded by the hyperintense signal of edema (Figure 1B).
case_images: Colonoscopy imaging. (A) Yellow plaque formation under the enteric mucosa with an unclear blood vessel network, indicating a specific inflammatory response to Schistosoma eggs. (B) Photomicrograph of histologic section showing calcified Schistosoma japonicum eggs in the lamina propria of the rectum (hematoxylin-eosin staining, objective x200).
case_images: fneur-13-990998-g0002.jpg
case_images: PMC9519849_01_fneur-13-990998-g0002.jpg
case_images: F2
case_images: An electronic colonoscopy showed a specific inflammatory response to the Schistosoma eggs (Figure 2A). The following mucosal biopsy confirmed the presence of S. japonicum eggs in the lamina propria of the rectum (Figure 2B).
case_images: (A-C) MRI at admission: Axial, sagittal, and coronal T1-weighted, enhanced images showing significant, patchy, marked-enhancement lesions in the right brainstem after intravenous gadolinium administration. (D-F) Post-treatment MRI at the 4-month follow-up: T1-weighted enhanced images showing regressive lesions in the brainstem.
case_images: fneur-13-990998-g0003.jpg
case_images: PMC9519849_01_fneur-13-990998-g0003.jpg
case_images: F3
case_images: A non-specific tumor-like lesion that was surrounded by edema and associated with mass effect and heterogeneous contrast enhancement was revealed (Figures 3A-C). At the 4-month follow-up, the patient's symptoms had completely resolved, and a repeat cerebral MRI showed dramatic regression of the contrast enhancement in the brainstem (Figures 3D-F).