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Published on: March 29, 2020
Retrobulbar thrombus in a cat with systemic hypertension
Gary D Norsworthy1, Vanessa P de Faria
1Alamo Feline Health Center, San Antonio, TX, USA. tenlivesforcats@yahoo.com
Journal of Feline Medicine and Surgery
|December 28, 2010
Summary
A retrobulbar thrombus, a rare condition in cats, was identified in a hypertensive Norwegian Forest cat. Prompt treatment led to significant clinical improvement and blood pressure control.
Area of Science:
- Veterinary Medicine
- Ophthalmology
- Cardiology
Background:
- Systemic hypertension is a recognized condition in cats, potentially leading to secondary complications.
- Ocular manifestations of hypertension can include retinal hemorrhage and proptosis.
Observation:
- A 14-year-old Norwegian Forest cat presented with anorexia, lethargy, ocular protrusion, and third eyelid prolapse.
- Fundic examination revealed severe bilateral retinal hemorrhages, and elevated blood pressure (205/129 mmHg) was recorded.
Findings:
- Ultrasound suggested a retrobulbar thrombus caudal to the right globe.
- The cat showed marked clinical improvement and achieved good blood pressure control over 18 days.
Implications:
- This case represents the first documented instance of a retrobulbar thrombus in a feline patient with systemic hypertension.
- Highlights the importance of thorough ophthalmic and cardiovascular evaluation in cats presenting with suggestive clinical signs.

