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The information contained on this page is provided as general health information and is not intended to substitute as medical advice and direction from your physician or health care provider. Please direct any questions related to your health care provider. In an emergency, call 9-1-1 or go to the nearest emergency center.


Cavernous sinus thrombosis

Definition

Cavernous sinus thrombosis is a blood clot in an area at the base of the brain.

Causes

The cavernous sinus receives blood from veins of the face and brain. The blood drains it into other blood vessels that carry it back to the heart. This area also contains nerves that control vision and eye movements.

Cavernous sinus thrombosis is most often caused by a bacterial infection that has spread from the sinuses, teeth, ears, eyes, nose, or skin of the face.

You are more likely to develop this condition if you have an increased risk of blood clots.

Symptoms

Symptoms include:

  • Bulging eyeball, usually on one side of face
  • Cannot move the eye in a particular direction
  • Drooping eyelids
  • Headaches
  • Vision loss

Exams and Tests

Tests that may be ordered include:

  • CT scan of the head
  • Magnetic resonance imaging (MRI) of the brain
  • Magnetic resonance venogram
  • Sinus x-ray

Treatment

Cavernous sinus thrombosis is treated with high-dose antibiotics given through a vein (IV) if an infection is the cause.

Blood thinners help dissolve the blood clot and prevent it from getting worse or recurring.

Surgery is sometimes needed to drain the infection.

Outlook (Prognosis)

Cavernous sinus thrombosis can lead to death if left untreated.

When to Contact a Medical Professional

Call your health care provider right away if you have:

  • Bulging of your eyes
  • Drooping eyelids
  • Eye pain
  • Inability to move your eye in any particular direction
  • Vision loss

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Sinuses

References

Durand ML. Periocular infections. In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases, Updated Edition. 8th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 118.

Nath A, Berger J. Brain abscess and parameningeal infections. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 413.