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  • Title: Pigmentary retinopathy and nodular granuloma associated with acute retinal necrosis from varicella zoster virus and human herpes virus type 6: Case report.
    Author: Keorochana N, Suleesathira B, Vongkulsiri S.
    Journal: Medicine (Baltimore); 2023 Jun 30; 102(26):e33958. PubMed ID: 37390266.
    Abstract:
    RATIONALE: Acute retinal necrosis (ARN) caused by human herpes virus type 6 (HHV-6) is uncommon. We described a case of consecutive bilateral ARN, which was found to be a coinfection of varicella zoster virus (VZV) and HHV-6 in a 50-year-old woman, not well responded with systemic acyclovir. We showed the atypical findings with corresponding fundus and optical coherence tomography imaging. PATIENT CONCERNS: She presented with anterior segment inflammation with peripheral retinitis and vasculitis in the left eye with disease progression despite of initial antiviral treatment, end up with retinal detachment. The right eye, subsequently, developed focal retinitis. DIAGNOSIS: ARN was diagnosed by clinical fundus picture, confirmed by polymerase chain reaction (PCR). INTERVENTIONS: Initially, she was treated with intravenous acyclovir and intravitreal ganciclovir for left eye. Retinal necrosis progressed, followed by retinal detachment. Pars plana vitrectomy with silicone oil was performed. The right eye, subsequently, developed focal retinitis. Medication was switched to intravenous ganciclovir and then oral valganciclovir. OUTCOMES: Retinitis was resolved, generalized hyperpigmentation appeared as a salt-and-pepper appearance in the right eye. The left eye presented preretinal deposits on silicone-retina interphase along retinal vessels. Spectral-domain optical coherence tomography (SD-OCT) showed multiple hyperreflective nodules on retinal surface. LESSONS: ARN from coinfection of VZV and HHV-6 is rare. Preretinal granulomas and generalized hyperpigmentation could be one of the HHV-6 features. HHV-6 should be in the differential diagnosis for ARN. It responds well to systemic ganciclovir.
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