FIG 2. Case of a 32-year-old man (patient 12 in Table) with geminocystic astrocytoma.

A, Axial FLAIR MR image (10,002/166/1) obtained 0.8 months before radiation therapy shows normal signal intensity in the splenium.

B, Axial and C, sagittal FLAIR images (10,002/166/1) obtained 5.8 months after radiation therapy demonstrate a bright focus of abnormal signal intensity in the anterior subependymal region of the splenium of the corpus callosum (grade 2).