Fig. 8

Neurocysticercosis. a Vesicular stage. Gadolinium-enhanced axial T1-weighted MR image. Cystic lesion in the right ventricular atrium (arrow) whose content similar to the CSF; inside there is an eccentric dot with high signal intensity representing the protoscolex (“cyst with dot” sign). There is no enhancement as there is no or scant host reaction in this stage. b Colloidal vesicular stage. Axial fluid-attenuated inversion recovery MR image. There are several lesions located in the subarachnoid space and corticomedullary junction and one in the left thalamus, they have a content, which is denser than the CSF (is has a higher signal intensity) and are surrounded by marked oedema. c Colloidal vesicular stage. Gadolinium-enhanced axial T1-weighted MR image of the same patient as in c. The lesions show ring enhancement. d Calcified nodular phase. CT image showing multiple calcified lesions dispersed in the brain parenchyma mostly in the corticomedullary junction and subarachnoid space, and some of them in the right basal ganglia. They represent calcified granulomata in dead neurocysticercosis