History of brain tumor. Evaluate change. CT of brain without and with contrast:Examination again demonstrates heavily calcified and partially cystic multi-loculated mass in bilateral lateral ventricles. The mass is inseparable from the choroid plexus of the lateral ventricle and is believed to arise from the choroid plexus. On post infusion images there is no enhancement of this mass. The mass is larger in the right lateral ventricle and extends from the trigone of right lateral ventricle and into the body of right lateral ventricle. There is no evidence of hydrocephalus associated with this finding. In comparison with the prior examination there is no definitive evidence of increase in the size of this tumor or any change in its density characteristics. The measurements are minimally smaller than prior study however this could be secondary to slice positioning.Previously described increased signal intensity in the periventricular white matter and corpus callosum (edema) on MRI examination of brain cannot be identified on this CT study.This examination is otherwise unremarkable and also stable.90 cc of Omnipaque 350 was utilized for the study.
1.Calcified, cystic and multi-loculated mass in the lateral ventricles bilaterally with no enhancement or interval change since prior study.2.Differentials for this tumor include xanthogranuloma, great plexus carcinoma, lymphoma or metastatic lesion.