FIG 2. Case 1.

A, Unenhanced axial view cranial CT scan shows large right frontotemporal and left temporal porencephalic cysts with enlargement and remodeling of the middle cranial fossae.

B, Coronal view fluid-attenuated inversion recovery image (10002/147 [TR/TE]; inversion time, 2200 ms), obtained when the patient was 8 years old, shows large bilateral porencephalic cysts. There is absence of any surrounding high signal intensity gliosis. There is ex vacuo dilation of the right lateral ventricle.

C, Coronal T2-weighted image (6200/101 [TR/TE]) shows bilateral porencephalic cysts. Communication of the right cyst with the ventricular system after fenestration surgery can be seen.