Introduction
Background
Acute retinal necrosis (ARN) can lead to uveitis, retinal detachment, and blindness. Acute retinal necrosis was first described in the Japanese literature in 1971 and termed Kirisawa uveitis. During the past 3 decades, acute retinal necrosis syndrome has been a source of fear, frustration, and fascination for many ophthalmologists. Unfortunately, it usually is a visually devastating condition for the patient.
Pathophysiology
Acute retinal necrosis may be a result of dormant herpes simplex virus 1 (HSV-1), herpes simplex virus 2 (HSV-2), or varicella-herpes zoster virus (VZV) viral reactivation in the retina. The exact etiology of this reactivation is still elusive; however, an immunogenetic predisposition to the disease is likely.
Frequency
United States
Acute retinal necrosis accounts for 5.5% of uveitis cases over a 10-year period.1
International
In Switzerland, acute retinal necrosis accounts for 1.7% of uveitic cases.
Mortality/Morbidity
Significant visual loss may occur. Retinal detachment complicates most cases (~75%) and is a major cause of legal blindness in acute retinal necrosis.
Race
No clear racial predilection exists.
Sex
This condition appears to have a predilection for males; however, the extent is not clear.
Age
Acute retinal necrosis is a disease of young healthy individuals aged 20-50 years.
- A bimodal age distribution possibly exists, peaking at approximately ages 20 and 50 years. This distribution may be related to differences in etiologic agents.
- When varicella-zoster virus or herpes simplex virus type 1 is involved, the median age is 57 and 47 years, respectively.
- When herpes simplex virus type 2 is involved, the median age is 20 years.
Clinical
History
Typically, acute retinal necrosis is a disease of immunocompetent individuals. Initially, patients may complain of the following:
- Red eye
- Periorbital pain
- Hazy decreased vision
- Other areas of previous infections
- Primary varicella infections
- Herpes zoster
Physical
- Episcleritis or scleritis
- Keratic precipitates
- Fine
- Granulomatous
- Occlusive retinal vasculitis involving arteries and veins
- One or more focus of retinitis, resulting in necrosis with discrete borders located in the retinal periphery with circumferential spread
- Vitritis
- Optic neuropathy
Causes
Most cases of acute retinal necrosis have been reported to be caused by the following:2
- Varicella-zoster virus
- Herpes simplex type 1
- Herpes simplex type 23
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References
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Fisher JP, Lewis ML, Blumenkranz M, et al. The acute retinal necrosis syndrome. Part 1: Clinical manifestations. Ophthalmology. Dec 1982;89(12):1309-16. [Medline].
Gariano RF, Berreen JP, Cooney EL. Progressive outer retinal necrosis and acute retinal necrosis in fellow eyes of a patient with acquired immunodeficiency syndrome. Am J Ophthalmol. Sep 2001;132(3):421-3. [Medline].
Nussenblatt RB, Palestine AG. Acute retinal necrosis. In: Uveitis: Fundamentals and Clinical Practice. 1989:407-14.
Park SS, Holz HA, Ravage ZB, Merrill PT, Nguyen QD. Diagnostic and therapeutic challenges. Acute retinal necrosis syndrome. Retina. Apr 2008;28(4):660-4. [Medline].
Rodriguez A, Calonge M, Pedroza-Seres M, et al. Referral patterns of uveitis in a tertiary eye care center. Arch Ophthalmol. May 1996;114(5):593-9. [Medline].
Severin M, Neubauer H. Bilateral acute vascular retinal necrosis. Ophthalmologica. 1981;182(4):199-203. [Medline].
Tan JCH, Byles D, Stanford MR, Frith PA, Graham EM. Acute retinal necrosis in children caused by herpes simplex virus. Retina. 2001;21(4):344-7. [Medline].
Urayama A, Yamada N, Sasaki T. Unilateral acute uveitis with retinal periarteritis and detachment. Jpn J Clin Ophthalmol. 1971;25:607.
Young NJ, Bird AC. Bilateral acute retinal necrosis. Br J Ophthalmol. Sep 1978;62(9):581-90. [Medline].
Further Reading
Keywords
ARN, bilateral acute retinal necrosis, BARN, bilateral ARN, Kirisawa's uveitis, Kirisawa uveitis, blindness, retinal detachment, uveitis, red eye, eye pain, periorbital pain, decreased vision, vision problems, herpes simplex virus 1, HSV-1, herpes simplex virus 2, HSV-2, varicella-herpes zoster virus, VZV




Overview: Acute Retinal Necrosis