ABSTRACT: Acute retinal necrosis (ARN) should be in the differential diagnosis of a neonate who presents with vitritis. This report includes three cases of neonatal ARN at the Bascom Palmer Eye Institute from 2004 to 2009. Medical treatment with acyclovir helped reduce sequelae of herpes simplex virus (HSV) 2 infection. Patients with ARN are at risk for retinal detachment and blindness. Although mothers are screened during pregnancy, they are at risk of reactivation or primary contraction of HSV. A neonate presenting with vitritis should raise suspicion of ARN.
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