Fig. 1

Pre-operative MRI brain demonstrating a heterogeneous, enhancing posterior fossa lesion with surrounding edema (blue arrow). 1a: Axial T2-weighted; 1b: Axial FLAIR; 1c: Axial T1-weighted pre-contrast; 1d: Axial T1-weighted post-contrast; 1e: Sagittal T1-weighted post-contrast; 1f: Coronal T1-weighted post-contrast