Figure 1: (a) Axial image of plain CT scan reveals a hyperdense lesion in the premedullary cistern (b) Axial and Sagittal (d) Images of plain T1-weighted MR scan showing a hyperintense lesion in the premedullary cistern without contrast enhancement (c). T2 fast spin echo axial (e) and Fluid Attenuated Inversion Recovery (FLAIR) axial MR (f) Images showing homogenously decreased T2 signal; (g) DWI does not reveal restricted diffusion; (h) GRE sequence of MR showing absence of blooming