Case #30

CT

• Hyperattenuating extra-axial mass overlying the left sylvian fissure with small internal areas of hypoattenuation and surrounding vasogenic edema
• Lytic changes involving the inner table of the overlying calvarium

MRI

• T1 isointense, mildly T2 hyperintense, diffusely enhancing extra-axial mass overlying the left sylvian fissure measuring 6 x 4.2 x 6.4 cm
• Small internal areas of more pronounced T2 signal hyperintensity
• Mild corresponding restricted diffusion throughout the mass
• Surrounding vasogenic edema
• Associated mass effect resulting in local sulcal effacement, crowding of the left lateral ventricle, 7 mm left-to-right midline shift, and medialization of the left temporal uncus with crowding of the basal cisterns and mass effect on the midbrain