PMC9560684_01
(A) Axial CT, showing dilation of the lateral ventricles. (B, C) Axial MRI FLAIR sequences, showing hyperintense rim surrounding the ventricles, corresponding to ventriculitis. D,E. Axial T1 post-contrast (D) and sagittal T1 post-contrast (E) sequences, showing the same nodular lesion (arrow), preoperatively. (F) Sagittal T-1 post-contrast, postoperatively.
gr1.jpg
PMC9560684_01_gr1.jpg
fig1
Initial imaging with computed tomography (CT) was performed, revealing significant dilation of the lateral ventricles, with associated periventricular hypodensity and transependymal reabsorption, with the third and fourth ventricles having normal morphology (Fig. 1A). A complementary study with magnetic resonance imaging (MRI) confirmed clear signs of active hydrocephalus and ventriculitis (Fig. 1B-C) and the presence of a pseudonodular lesion in the third ventricle (Fig. 1D-E; arrow). One year later, the patient is asymptomatic and follow-up MRI does not show lesions (Fig. 1F).
(A) Endoscopic view of the right-sided foramen of Monro, pre-resection. (B) Endoscopic view of the right-sided foramen of Monro, during resection. (C) Macroscopic view of the parasite, after resection.
gr2.jpg
PMC9560684_01_gr2.jpg
fig2
The catheter was then removed and a ventriculoscopy evidenced a yellowish lesion, obstructing the foramen of Monro on both sides (Fig. 2; Video).
A-F. Microscopic views of Taenia solium (hematoxylin and eosin staining) at increasing magnifications. (A) Global panoramic of the entire parasite; macro-micro, H-E. (B-D) Patient-parasite inflammatory interphase, with neutrophilic reaction (arrows); 20x (B,C), 40x (D), H-E. (E) High-power view of the parasite; 40x, H-E. (F) Parts of the parasite undergoing calcification (arrowhead); 40x, H-E.
gr3.jpg
PMC9560684_01_gr3.jpg
fig3
Taenia solium (Fig. 3). The patient subsequently completed therapy with albendazol for 14 days and was then discharged home without hydrocephalus but with mild symptoms related to forniceal damage.