Figure 1.

Magnetic resonance imaging (MRI) for the detection and localization of the cystic lesion. (A) T2, (B) T1-weighted contrast enhanced, (C) susceptibility-weighted, and (D) diffusion-weighted images from an MRI brain show a cystic mass (8 mm), located peripherally in the right occipital lobe with surrounding vasogenic edema. The cyst had an enhancing T2 hypointense wall. Best appreciated on the T2 and susceptibility-weighted image sequences is a punctate low-signal focus within the cyst (arrow). The lack of diffusion restriction of the fluid contents is not consistent with a pyogenic abscess. The morphology was typical of neurocysticercosis in the colloidal vesicular phase,¹⁶ and the internal punctate focus represents the parasite scolex.