28    Tuberous Sclerosis and Sturge-Weber Syndrome

Tuberous sclerosis is an autosomal dominant (and spontaneously occurring) condition defined by facial adenoma sebaceum, seizures, and mental retardation. Intracranial findings are hamartomatous lesions consisting of subependymal nodules and cortical tubers. Figures 28.1A and 28.1B demonstrate multiple subependymal nodules lining the walls of the lateral ventricles. Although these lesions are clearly seen in this instance as low SI on T2WI (Fig. 28.1A, white arrows) and high SI on T1WI (Fig. 28.2B

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