Congenital Zika Virus Infection: a Review with Emphasis on the Spectrum of Brain Abnormalities

VHP, Leão; Aragão, MM; Pinho, RS; Hazin, AN; Paciorkowski, AR; Penalva de Oliveira, AC; Masruha, Marcelo Rodrigues

PURPOSE OF REVIEW: In 2016, the World Health Organization declared the Zika virus (ZIKV) outbreak a Public Health Emergency of International Concern following a cluster of associated neurological disorders and neonatal malformations. Our aim is to review the clinical and neuroimaging findings seen in congenital Zika syndrome. RECENT FINDINGS: ZIKV injures neural progenitor cells in the hippocampus, a brain region important for learning, memory, cognition, and emotion/stress response. Positron emission tomography has revealed global neuroinflammation in ZIKV infection in animal models. SUMMARY: Congenital Zika syndrome is associated with a spectrum of brain abnormalities, including microcephaly, parenchymal calcifications, malformations of cortical development and defective neuronal migration, corpus callosum abnormalities, ventriculomegaly, and brainstem and cerebellar abnormalities.