Bilateral Maculopathy in an Infant Following Measles, Mumps, Rubella, and Varicella-Zoster (MMRV) Vaccination.

PURPOSE: To report on the long-term clinical outcome of a healthy infant who presented with posterior uveitis following the administration of the combined measles, mumps, rubella, and varicella (MMRV) vaccine. METHODS: Descriptive case report. RESULTS: A 13-month-old infant presented with bilateral visual loss two weeks after receiving the MMRV vaccine. Ophthalmic examination revealed bilateral retinitis and retinal vasculitis with exudative retinal detachment. Extensive infectious work-up was conducted including serologic exams and PCR testing of blood, aqueous humor, cerebrospinal fluid and urine. Serological tests for measles yielded positive IgM and IgG titers. PCR testing for measles in the aqueous humor and urine was negative. Neurologic assessment and neuroimaging were unremarkable, excluding central nervous system involvement. Empiric systemic antiviral and corticosteroid therapy was initiated. Gradual resolution of posterior uveitis ensued, culminating in bilateral macular scars. Over a six-year follow-up period, the patient demonstrated stable ocular findings with no evidence of recurrent inflammation or systemic autoimmune disease. Final visual acuity was 6/9 in each eye. CONCLUSIONS: This case represents a rare occurrence of non-necrotizing retinitis following MMRV vaccination. To our knowledge, this is the first report describing the sequential OCT characteristics of presumed measles vaccine-associated retinitis. The prolonged follow-up period supports the absence of an alternative etiology and provides valuable insight into the long-term course and visual prognosis of vaccine-associated retinopathy.