Figure 1

Ultrasonographic and magnetic resonance imaging examinations at 9 years and 4 months of age. Renal ultrasound showed the small size of the kidneys for the patient’s age: a the right kidney (length, 70.2 mm) and b the left kidney (length, 75.9 mm) with a simple renal cyst (1.13 × 0.78 cm) indicated by an arrowhead. Magnetic resonance imaging revealed brain atrophy; c diffuse enlargement of the subarachnoid spaces, bilateral widening of the sylvian fissures, and hypomyelination of the anterior white matter; and d thinning of the corpus callosum.