retinal artery occlusive disorders in the...
TRANSCRIPT
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Retinal Artery Occlusive Disorders in the Young
Anita Agarwal, MD West Coast Retina, San Francisco, CA
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Disclosures
• None
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Glimpse of each
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Sudden superior field loss
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Several emboli
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Multiple emboli
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Sudden superior field loss in a 40 year old woman
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22 year old woman
Courtesy: Dr. William Mieler
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24 year old male
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Retinitis adjacent to the BRAO
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14 year old male
Courtesy: Dr. Rick Spaide
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• Young adults • Multiple BRAO’s • Simultaneous or
recurrent • Unilateral or bilateral • Photopsias
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Susac’s Syndrome: Ocular Symptoms
• Sudden visual field loss • Photopsias • Recurrent field losses • Hearing loss • Balance problems • Neuropsychiatric symptoms • Focal neurological deficits
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Susac Syndrome: Ocular Symptoms
• Field loss caused by recurrent episodes of branch retinal artery occlusions
• Field loss resolves partly when some of the watershed zone recovers
• Photopsias - irregular shimmering
geometric lines or shapes of light just preceding a new scotoma and confined to the area of the scotoma
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Susac syndrome • Mean age of onset 46 years (14-60 years) • Both sexes equally affected, though some
neurology literature suggests more women • Recurrent episodes of BRAO extending
sometimes to over 10 years
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Idiopathic Recurrent Branch Retinal Artery Occlusion (Susac’s)
• Can occur in the mid portions or bifurcation of arterioles
• Retinal opacification due to decreased axoplasmic flow
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Idiopathic Recurrent Branch Retinal Artery Occlusion (Susac’s)
• No visible emboli • Periarterial plaques
likely from extravasations of lipid through the damaged endothelium into the vessel wall
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Idiopathic Recurrent Branch Retinal Artery Occlusion: Fl Angiography
Fusiform staining of the vessel wall
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Idiopathic Recurrent Branch Retinal Artery Occlusion: FA
• Fusiform staining of the vessel wall
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Often in areas remote from the occlusion
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Instruct the photographer to scan un-involved areas
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Susac: Long term appearance
• Narrowed & sheathed arterioles
• Optic atrophy • Occasionally:
New vessels on the disc, retina or iris
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Retinal Non perfusion
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Recurrence 3 years later
Fusiform staining
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Recurrence- new area 3 years later
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Visual field defects: Patchy
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Peri corpus callosum lesions
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Often the vessel wall staining is in the unobstructed arteriole
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Susac’s Syndrome- Etiopathogenesis
• What is known – – Affects retinal, CNS and cochlear vessels – No circulating antibodies found as yet – Responds variably to immunosuppression
• Possibilities –
– Peculiar antigenicity sharing of the retinal, CNS and cochlear blood vessel wall
– immunologic response
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Susac’s syndrome: Treatment
• Systemic Steroids: Initial high dose and maintenance on low dose
• Immunosuppressive agents: Mycophenolate mofetil, methotrexate, others
• Immunomodulator: Rituximab
• IV Immunoglobulin: monthly initially, followed by bimonthly
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Embolic BRAO: heart valve
Large, calcific
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Single or multiple
Color of embolus: not always accurate in correlating to source/etiology
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Lodge at bifurcation
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Arterio-arterial anastamosis occasionally
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Cardiac origin
• Echocardiogram including trans esophageal echo
• Clinical evaluation
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Several immediately post procedure
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Choroidal and retinal infarcts
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Amalric’s triangle
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During Onyx embolism of a cranial aneurysm
• Manipulation of the hardware in the carotid bulb
• Released cholesterol plaques • Not the onyx
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Pigment change: choroidal inv.
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15 year old male
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Autofluorescence imaging
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Collar bone fracture
• Persistent foramen ovale • 29% of general population have a
persistent foramen ovale • Paradoxical embolus
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44 year old woman
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CT angiogram
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Birefringence of Talc lung biopsy
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Talc embolism
• IV drug user • Patent foramen ovale • Talc emboli
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Talc Retinopathy: Usual
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Giant cells & Foreign bodies Lung (lung Tx for COPD)
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Several Bilateral Emboli
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Intra lesional triamcinolone for a hemangioma on the face
• VA dropped to LP in both eyes • Paracentesis done • Vision recovered to Count fingers soon
after and eventually to 20/60 in each eye
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20/60 OU
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16 year old male history of left epistaxis received 32 mg of triamcinolone acetate into the left nasal septum
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Pruning of the Retinal arterioles Patchy Choroidal obstruction
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2 years Follow up: 20/80 with central scotoma
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Corticosteroid Embolization of the Retina and Choroid
• reported after intralesional injections of capillary hemangiomas, chalazion, and various locations of the head and neck
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Mechanism
• intralesional pressure greater than diastolic • retrograde arterial flow into the ophthalmic
artery and downstream into the choroidal and retinal circulation
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40 year old woman
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Protein S deficiency
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African American woman
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Sickle cell occlusion
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Treatment: Exchange transfusion - Recovered
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Cat Scratch Disease
Foci of retinitis and branch retinal artery occlusion
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Bacillary Angioma (? VEGF)
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Cat Scratch Disease
Multifocal retinitis & papillitis
§ Children and young adults § Acute visual loss, usually unilateral § Antecedent illness § Multiple white retinal lesions § Branch retinal artery occlusion
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Cat Scratch Disease
Predilection for branch retinal artery occlusion
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Cat Scratch Disease
Predilection for capillary proliferation in foci of retinitis & optic neuritis
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Cat Scratch Disease
Predilection for capillary proliferation in foci of retinitis & optic neuritis FA: pseudoangiomatous lesions
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Retinitis adjacent to the BRAO
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Toxoplasma retinitis
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Pre papillary loop
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Summary: BRAO • Several causes • Look out for the company it keeps • Remember 29% have persistent foramen
ovale – paradoxical embolism • Specific angiographic appearance • Target management based on the
mechanism • Occasionally unusual mechanisms