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			{{Infobox medical condition
			\| name = Acute retinal necrosis
			\| synonyms = ARN
			\| field = [[Ophthalmology]]
			\| symptoms = [[Eye pain]], [[vision loss]], [[red eye]], [[photophobia]]
			\| complications = [[Retinal detachment]], [[blindness]]
			\| onset = Rapid
			\| duration = Variable
			\| causes = [[Herpes simplex virus]], [[Varicella zoster virus]]
			\| risks = [[Immunocompromised state]], [[HIV/AIDS]], [[organ transplant]]
			\| diagnosis = [[Clinical examination]], [[Ophthalmic imaging]], [[PCR testing]]
			\| differential = [[Cytomegalovirus retinitis]], [[Toxoplasmosis]], [[Syphilitic uveitis]]
			\| treatment = [[Antiviral therapy]], [[corticosteroids]], [[vitrectomy]]
			\| prognosis = Variable, often poor without treatment
			\| frequency = Rare
			}}
	'''Acute Retinal Necrosis (ARN)''' is a rare but serious eye condition characterized by the rapid inflammation and necrosis of the retina. It is typically caused by a viral infection, most commonly by members of the herpesvirus family, including [[Herpes simplex virus\|Herpes simplex virus (HSV)]] types 1 and 2, [[Varicella zoster virus\|Varicella zoster virus (VZV)]], and less frequently by [[Epstein-Barr virus\|Epstein-Barr virus (EBV)]] and [[Cytomegalovirus\|Cytomegalovirus (CMV)]].		'''Acute Retinal Necrosis (ARN)''' is a rare but serious eye condition characterized by the rapid inflammation and necrosis of the retina. It is typically caused by a viral infection, most commonly by members of the herpesvirus family, including [[Herpes simplex virus\|Herpes simplex virus (HSV)]] types 1 and 2, [[Varicella zoster virus\|Varicella zoster virus (VZV)]], and less frequently by [[Epstein-Barr virus\|Epstein-Barr virus (EBV)]] and [[Cytomegalovirus\|Cytomegalovirus (CMV)]].

	==Symptoms==		==Symptoms==
	The initial symptoms of ARN can be non-specific and may include [[Eye pain\|eye pain]], [[Red eye\|redness of the eye]], [[Photophobia\|sensitivity to light]], and blurred vision. As the condition progresses, patients may experience a rapid decline in vision due to the involvement of the retina and the underlying [[Choroid\|choroid]] layer.		The initial symptoms of ARN can be non-specific and may include [[Eye pain\|eye pain]], [[Red eye\|redness of the eye]], [[Photophobia\|sensitivity to light]], and blurred vision. As the condition progresses, patients may experience a rapid decline in vision due to the involvement of the retina and the underlying [[Choroid\|choroid]] layer.

	==Causes==		==Causes==
	ARN is primarily caused by a reactivation of latent herpesvirus infection within the body. The exact mechanism by which the virus reactivates and targets the retina is not fully understood, but it is believed to involve the immune system's inability to keep the virus in check, leading to widespread inflammation and tissue damage.		ARN is primarily caused by a reactivation of latent herpesvirus infection within the body. The exact mechanism by which the virus reactivates and targets the retina is not fully understood, but it is believed to involve the immune system's inability to keep the virus in check, leading to widespread inflammation and tissue damage.

	==Diagnosis==		==Diagnosis==
	Diagnosis of ARN involves a comprehensive eye examination, including [[Fundoscopy\|fundoscopy]], which reveals characteristic patterns of retinal necrosis. Additional tests may include blood tests to identify the causative virus, [[Polymerase chain reaction\|polymerase chain reaction (PCR)]] testing of the [[Vitreous humor\|vitreous]] or [[Aqueous humour\|aqueous humor]] to detect viral DNA, and imaging studies such as [[Fluorescein angiography\|fluorescein angiography]] to assess the extent of retinal involvement.		Diagnosis of ARN involves a comprehensive eye examination, including [[Fundoscopy\|fundoscopy]], which reveals characteristic patterns of retinal necrosis. Additional tests may include blood tests to identify the causative virus, [[Polymerase chain reaction\|polymerase chain reaction (PCR)]] testing of the [[Vitreous humor\|vitreous]] or [[Aqueous humour\|aqueous humor]] to detect viral DNA, and imaging studies such as [[Fluorescein angiography\|fluorescein angiography]] to assess the extent of retinal involvement.

	==Treatment==		==Treatment==
	Treatment of ARN is aimed at controlling the viral infection and reducing inflammation to prevent further damage to the retina. This typically involves the use of antiviral medications such as [[Acyclovir]], [[Valacyclovir]], or [[Famciclovir]], often in combination with corticosteroids to reduce inflammation. In some cases, surgical intervention, such as [[Vitrectomy\|vitrectomy]], may be necessary to remove the vitreous gel and replace it with a saline solution to maintain the eye's shape and prevent retinal detachment.		Treatment of ARN is aimed at controlling the viral infection and reducing inflammation to prevent further damage to the retina. This typically involves the use of antiviral medications such as [[Acyclovir]], [[Valacyclovir]], or [[Famciclovir]], often in combination with corticosteroids to reduce inflammation. In some cases, surgical intervention, such as [[Vitrectomy\|vitrectomy]], may be necessary to remove the vitreous gel and replace it with a saline solution to maintain the eye's shape and prevent retinal detachment.

	==Prognosis==		==Prognosis==
	The prognosis for patients with ARN can vary widely depending on the promptness of diagnosis and treatment. Early intervention with antiviral therapy and corticosteroids can help to preserve vision, but some patients may still experience significant vision loss or blindness in the affected eye. Regular follow-up with an ophthalmologist is essential for monitoring the condition and managing any complications.		The prognosis for patients with ARN can vary widely depending on the promptness of diagnosis and treatment. Early intervention with antiviral therapy and corticosteroids can help to preserve vision, but some patients may still experience significant vision loss or blindness in the affected eye. Regular follow-up with an ophthalmologist is essential for monitoring the condition and managing any complications.

	==Prevention==		==Prevention==
	Prevention of ARN involves the management of systemic herpesvirus infections and maintaining a healthy immune system. For individuals with a history of herpesvirus infections, antiviral prophylaxis may be recommended to prevent reactivation.		Prevention of ARN involves the management of systemic herpesvirus infections and maintaining a healthy immune system. For individuals with a history of herpesvirus infections, antiviral prophylaxis may be recommended to prevent reactivation.

	[[Category:Eye diseases]]		[[Category:Eye diseases]]
	[[Category:Viral diseases]]		[[Category:Viral diseases]]
	[[Category:Infectious diseases]]		[[Category:Infectious diseases]]

	{{Medicine-stub}}		{{Medicine-stub}}
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	~~__NOINDEX__~~

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New page

'''Acute Retinal Necrosis (ARN)''' is a rare but serious eye condition characterized by the rapid inflammation and necrosis of the retina. It is typically caused by a viral infection, most commonly by members of the herpesvirus family, including [[Herpes simplex virus|Herpes simplex virus (HSV)]] types 1 and 2, [[Varicella zoster virus|Varicella zoster virus (VZV)]], and less frequently by [[Epstein-Barr virus|Epstein-Barr virus (EBV)]] and [[Cytomegalovirus|Cytomegalovirus (CMV)]].

==Symptoms==
The initial symptoms of ARN can be non-specific and may include [[Eye pain|eye pain]], [[Red eye|redness of the eye]], [[Photophobia|sensitivity to light]], and blurred vision. As the condition progresses, patients may experience a rapid decline in vision due to the involvement of the retina and the underlying [[Choroid|choroid]] layer.

==Causes==
ARN is primarily caused by a reactivation of latent herpesvirus infection within the body. The exact mechanism by which the virus reactivates and targets the retina is not fully understood, but it is believed to involve the immune system's inability to keep the virus in check, leading to widespread inflammation and tissue damage.

==Diagnosis==
Diagnosis of ARN involves a comprehensive eye examination, including [[Fundoscopy|fundoscopy]], which reveals characteristic patterns of retinal necrosis. Additional tests may include blood tests to identify the causative virus, [[Polymerase chain reaction|polymerase chain reaction (PCR)]] testing of the [[Vitreous humor|vitreous]] or [[Aqueous humour|aqueous humor]] to detect viral DNA, and imaging studies such as [[Fluorescein angiography|fluorescein angiography]] to assess the extent of retinal involvement.

==Treatment==
Treatment of ARN is aimed at controlling the viral infection and reducing inflammation to prevent further damage to the retina. This typically involves the use of antiviral medications such as [[Acyclovir]], [[Valacyclovir]], or [[Famciclovir]], often in combination with corticosteroids to reduce inflammation. In some cases, surgical intervention, such as [[Vitrectomy|vitrectomy]], may be necessary to remove the vitreous gel and replace it with a saline solution to maintain the eye's shape and prevent retinal detachment.

==Prognosis==
The prognosis for patients with ARN can vary widely depending on the promptness of diagnosis and treatment. Early intervention with antiviral therapy and corticosteroids can help to preserve vision, but some patients may still experience significant vision loss or blindness in the affected eye. Regular follow-up with an ophthalmologist is essential for monitoring the condition and managing any complications.

==Prevention==
Prevention of ARN involves the management of systemic herpesvirus infections and maintaining a healthy immune system. For individuals with a history of herpesvirus infections, antiviral prophylaxis may be recommended to prevent reactivation.

[[Category:Eye diseases]]
[[Category:Viral diseases]]
[[Category:Infectious diseases]]

{{Medicine-stub}}

Acute retinal necrosis - Revision history

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