Joubert syndrome associated with new MRI findings and posterior reversible encephalopathy syndrome.

Joubert syndrome (JS) is an inherited disorder char acterized by transient episodic hyperpnea, ataxia, and vermian hypoplasia. Typical imaging findings of JS include hypoplasia or aplasia of the cerebellar vermis, thick and elongated superior cerebellar peduncles and an abnormally deep interpeduncular fossa with ‘molar tooth sign’. We present a case of JS associated with deep cere bral sulci and fissures, polymicrogyria, and additional findings of posterior reversible encephalopathy syndrome associated with renal involvement.