D1 CT after transfontanellar echography showing hydrocephalus
Midline, vermis centered posterior fossa tumor bulging into the 4th ventricle, with obstructive hydrocephalus.
Tumor is heterogeneous, with cystic CSF-like densities and spontaneous hemorrhage. No internal calcification.
Round shape, no spreading through the foramen of Magendie nor the lateral foramens of Luschka.