Legend Axial NECT scans show a cystic mass within the anterior horn of left lateral ventricle with bowing of the septum pellucidum towards the right. The ventricles are enlarged (L>>R) and are bordered by a halo of hypodensity.

Legend Axial T2WI & FLAIR and Sagittal T1WIs show that the signal within the left intraventricular mass follows CSF signal. Again, fluid signal has accumulated around the ventricles, suggestive of transependymal flow due to increased ventricular pressure. On the sagittal T1WI, the corpus callosum is elevated and stretched, the optic chiasm and inferior recesses of the third ventricle are depressed into the suprasellar cisterns, and the mamillo-pontine distance is decreased.

Legend Left & Center: Post contrast Axial and Sagittal T1WIs disclosde an enhancing nodule near the left foramen of Monroe. The rest of the cystic mass does not enhance. Right: Axial DWI shows no restriction of diffusion within the mass; rather, there is free diffusion as in the CSF spaces. Key words: ct mri infection inflammation dwi hydrocephalus

Brain Diagnosis: Intraventricular cysticercosis