Cavernous sinus thrombosis

  • Uncommon
  • Life threatening
  • Originate from upper anterior tooth infection – via facial artery, angular artery, ophthalmic vein, pterygoid plexus
  • Can result in blindness or death
Cavernous sinus and pterygoid plexus communication. Foramen ovale, foramen lacerum


  • Gross edema of eyelid, associated with pulsating exopthalmus
  • Due to venous obstruction
  • Cyanosis
  • Ptosis
  • Fixed dilated pupil
  • Limited eye movement

Systemic symptoms:

  • Serious illness
  • Rigours
  • High swinging fever
  • Deteriorating eyesight


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