A Closer Investigation of the Synchronous Bilateral Pattern of MRI Lesions in Acute Necrotizing Encephalopathy Type 1.

We observed a lesion pattern in a series of 4 cases of RANBP2-mutation-linked acute necrotizing encephalopathy, which appears to be specific for this condition. The setting of synchronous bilateral mammillary, amygdaloid, and lateral geniculate lesions, along with claustro-parahippocampal lesions, can serve as a diagnostic tool in this condition. We add several further details to the MR imaging features of the typical brain lesions encountered in this disease.