Choroid plexus carcinoma

2-year-old with pathologically proven choroid plexus carcinoma. Noncontrast CT (A) and T2- (B), T1- (C), and postcontrast T1-weighted (D, E) MRIs show a large, cauliflower-like intraventricular mass. There are subtle imaging signs of parenchymal invasion: On transverse axial T2-weighted and postcontrast T1-weighted images, especially coronal views, ependymal invasion (arrows) and extension into brain is demonstrated.