Congenital choroid plexus papilloma of the third ventricle: diagnosis with real-time sonography and MR imaging.

Congenital neoplasms of the choroid plexus are uncommon. A case of a surgically resected congenital third-ventricular choroid plexus papilloma is presented to demonstrate the appearance of this tumor using real-time sonography and MR imaging. The sonographic features of this tumor are reviewed and compared with previous reports . The MR characteristics are correlated with sonographic findings, with gross pathologic features, and with histology. A review of choroid plexus papilloma presenting within the neonatal period is also provided.