A 5-year-old girl with right lateral ventricle choroids plexus papilloma.A, Axial postcontrast T1-weighted image shows an avidly enhancing, intraventricular.

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High-signal-intensity lesions on T2-weighted MR images

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Presentation transcript:

A 5-year-old girl with right lateral ventricle choroids plexus papilloma.A, Axial postcontrast T1-weighted image shows an avidly enhancing, intraventricular mass.B, Dynamic susceptibility-weighted contrast-enhanced image during the maximum bolus demonstrate... A 5-year-old girl with right lateral ventricle choroids plexus papilloma.A, Axial postcontrast T1-weighted image shows an avidly enhancing, intraventricular mass.B, Dynamic susceptibility-weighted contrast-enhanced image during the maximum bolus demonstrates marked signal intensity drop within the tumor because of increased tumor vascularity.C, Susceptibility-weighted signal intensity time curves from regions of interest placed over the tumor (green) and the contralateral normal brain (pink) show marked difference in signal intensity recovery between the 2 regions. The tumor vasculature lacks blood-brain barrier and there is immediate and marked leakage of contrast agent during the bolus phase (arrows) and minimal return to the baseline. S. Cha AJNR Am J Neuroradiol 2006;27:475-487 ©2006 by American Society of Neuroradiology