Female, 5 years old, with seizure, grade 4 intraventricular hemorrhage as an infant, periventricular leukomalacia. Evaluate for progression of PVL. The lateral ventricles are prominent, left side more than right, and both demonstrate a somewhat wavy external contour. A porencephalic cyst is redemonstrated along the body of the left lateral ventricle. This correlates to the location of the patient's prior hemorrhage and has not significantly changed when compared to a prior head ultrasound. Diffusion-weighted images are within normal limits. No edema or mass effect is observed. No acute intracranial hemorrhage is detected.The cerebral white matter is thinned bilaterally, but otherwise, the degree of myelination is appropriate for age. The pituitary region is unremarkable. The brainstem and cerebellum are fully formed and intact. The corpus callosum is fully formed and intact although somewhat thinned. The mesial temporal lobe structures are symmetric and free of focal signal abnormality. The left thalamus and left cerebral peduncle are atrophic relative to the right which probably reflects loss of white matter fiber tracts.
Findings are seen compatible with periventricular leukomalacia and porencephalic cyst formation along the left lateral ventricle related to prior grade 4 IVH. Given that comparison has been made to prior ultrasound examinations, no significant interval change in these chronic findings is suspected. No acute abnormalities are detected.