Figure 2.

Longitudinal follow-up of atypical brain FASI in a 5 year-old NF1 male patient: axial TSE T2w (first row) and coronal post-contrast T1w (second row) MRI showing a oval-shaped lesion into the right occipital forceps of the splenium corpus callosum at three different time points (a = 5, b = 5.5, and c = 6 years old). The lesion was T2-hyperintense with punctate enhancement at diagnosis, showed a transient volume increase with focal contrast enhancement, and then completely regressed at one-year longitudinal MRI follow-up.