Figure 1.

Basal ganglia germinoma. Axial MRI scans reveal a lesion (cyst/mass ratio = 0.71) in the right basal ganglia, showing iso-hypointensity on T ₁WI (Top left) and iso-hyperintensity on T ₂WI (Top right). The posterior limb of ipsilateral internal capsule is involved, showing hyperintensity on T ₂WI (Top right). The atrophy of ipsilateral cerebral peduncle is visible on T ₂WI (Lower left). The lesion shows mixed density on axial CT, and CT density of the solid part is 40 Hu (Lower right). Hu Hounsfield unit; T ₁WI, T ₁ weighted imaging; T ₂WI, T ₂ weighted imaging.