PMC3424678_01
Preoperative MRI images. Axial T2 (a) and coronal T1 (b) MRI images with contrast demonstrate a large mass (choroid plexus papilloma) in the left CPA region with significant mass effect on the lower brain stem with obstruction of the fourth ventricle
SNI-3-75-g001.jpg
PMC3424678_01_SNI-3-75-g001.jpg
F1
An MRI of the brain prior to surgery revealed a left heterogeneous enhancing mass on the left cerebello-pontine angle (CPA) region with significant mass effect on the brainstem [Figure 1].
Postoperative MRI images. Axial T2 (a) and coronal T1 (b) MRI images with contrast demonstrate residual tumor with cystic changes and brain stem compression in addition to postoperative changes
SNI-3-75-g002.jpg
PMC3424678_01_SNI-3-75-g002.jpg
F2
Mass effects on the left aspect of the pons, medulla and the cisternal segments of cranial nerves VII and VIII were also identified [Figures 2 and 3].
Postoperative sagittal T1 MRI images with contrast demonstrate large residual tumor with a mass effect in posterior fossa including cerebellum (a) and brain stem, pons and medulla (b)
SNI-3-75-g003.jpg
PMC3424678_01_SNI-3-75-g003.jpg
F3
Mass effects on the left aspect of the pons, medulla and the cisternal segments of cranial nerves VII and VIII were also identified [Figures 2 and 3].