This MRI was performed 4 weeks later. The previously described mass of the inferior 4th ventricle shows an extension through the foramen of Magendie, posterior to the medulla and bulbomedullary junction which are mildly anteriorly displaced. This mass appears iso-to hypointense to the gray matter on T1WI, slightly hyperintense on FLAIR, and T2WI with mild and diffuse enhancement on postcontrast sequences. The foci of calcification seen on CT appears of low signal on T1WI, high signal on T2WI and suppress on FLAIR sequence. As compared to the CT, there is increased pressure within the ventricular system (3rd, and lateral ventricles), with oedema around the VP shunt as well as mild right frontoparietal iatrogenic subdural hygroma.