Figure legends
Figure 1. Brain MRI in cases 1-4. T2-wi (A,B), ADC (C), T1-wi after contrast medium (D) showing tumors in the posterior fossa located in the fourth ventricle. In cases 1-3, the masses appear to be gross midline, with no definite laterality. Note involvement of the left (case 1) and right (case 2) postero-lateral recesses of the fourth ventricle in subtype B (arrows), and of the right antero-lateral recess of the fourth ventricle in subtype A (arrowheads in case 3). In case 4, the tumor is midline, with no obvious laterality. Subtype A is the most central of all WNT medulloblastomas (ref Patay Z et al 2015). All tumors show similar signal abnormalities and enhancement patterns.
Figure 2. Survival free of other oncological events