Male, 19 months old, with seizures. Follow-up white matter lesions in the posterior quadrant. Mild FLAIR hyperintensity is seen along the right occipital horn without obvious edema or mass effect. This finding has diminished in conspicuity when compared to the prior examination. Previously seen similar hyperintensity along the left occipital horn has resolved. A small focus of FLAIR hyperintensity within the right centrum semiovale is unchanged.No evidence of parenchymal edema or mass effect is seen. Brain parenchymal morphology is within normal limits. No definite structural abnormalities are seen. No evidence of intracranial hemorrhage or any abnormal extra-axial fluid collection is detected. Diffusion weighted images are within normal limits. Ventricular size and morphology are normal.The region of the pituitary is unremarkable. The brainstem and cerebellum are normally formed and intact. The corpus callosum is within normal limits. The pattern of white matter myelination is appropriate for age, and has matured when compared to the prior study. The mesial temporal lobe structures are symmetric and free of focal lesions.
1.No definite or specific lesions are seen which would account for the patient's seizures.2.FLAIR hyperintensity along the occipital horns as seen on the prior examination has diminished on the present study. This could simply represent maturation of the terminal zones of myelination. The possibility of mild superimposed gliosis, at least along the right occipital horn, could also be entertained. A small focus of nonspecific FLAIR signal abnormality in the right centrum semiovale may also represent minimal gliosis.