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Updated: Dec 22, 2025

Utilizing a Cranial Window to Visualize the Middle Cerebral Artery During Endothelin-1 Induced Middle Cerebral Artery Occlusion
Published on: February 22, 2013
Essential thrombocythemia manifesting as ophthalmic artery occlusion
Kittipong Thabsuwan1, Yodpong Chantarasorn1
1Department of Ophthalmology, Vajira Hospital, Navamindradhiraj University, 681 Samsen Street, Dusit Bangkok, 10300, Thailand.
Purpose:
To report the first case of a patient with essential thrombocythemia (ET) who presented with unilaterally extensive choroidal ischemia coinciding with central retinal artery occlusion (CRAO).Observations: A 64-year-old man presented with a classic sign of short posterior ciliary artery (SPCA) occlusion, Amalric triangular choroidal infarction, coinciding with CRAO in the left eye. He was later diagnosed as having ET due to a massive platelet count of 1,100,000 cells/mm3 and confirmed genetic testing. The magnetic resonance angiogram subsequently revealed severe occlusions of neuro-ophthalmic circulation. Interestingly, occult choriocapillaris occlusions were detected in the right eye despite being visually asymptomatic.
Conclusion And Importance:
Patients with ET can present with concurrent CRAO and SPCA occlusion. Identifying the causes of such events is crucial as these can precede systemic thrombocytosis or hemorrhagic complications.
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