Cavernous sinus syndrome
A cavernous sinus thrombosis is a blood clot within the cavernous sinus, a large channel of venous blood in a cavity bordered by the sphenoid bone and the temporal bone of the skull. The cavernous sinus is an important structure because of its location and its contents which include the third cranial (oculomotor) nerve, the fourth cranial (trochlear) nerve, parts 1 (the ophthalmic nerve) and 2 (the maxillary nerve) of the fifth cranial (trigeminal) nerve, and the sixth cranial (abducens) nerve. A thrombosis (clot) in this key crossroads causes the cavernous sinus syndrome which is characterized by edema (swelling) of the eyelids and the conjunctivae of the eyes and paralysis of the cranial nerves which course through the cavernous sinus.

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edema of the conjunctiva, proptosis, edema of upper lid and root of the nose, together with paralysis of the third, fourth, and sixth cranial nerves and the ophthalmic branch of the fifth; it is usually due to thrombosis or tumor of the cavernous sinus. Cf. Tolosa-Hunt s. Called also Foix s.

Medical dictionary. 2011.

Look at other dictionaries:

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  • Syndrome, cavernous sinus — A cavernous sinus thrombosis is a blood clot within the cavernous sinus, a large channel of venous blood in a cavity bordered by the sphenoid bone and the temporal bone of the skull. The cavernous sinus is an important structure because of its… …   Medical dictionary

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  • Thrombosis, cavernous sinus — A cavernous sinus thrombosis is a blood clot within the cavernous sinus, a large channel of venous blood in a cavity bordered by the sphenoid bone and the temporal bone of the skull. The cavernous sinus is an important structure because of its… …   Medical dictionary

  • Sinus, cavernous — A large channel of venous blood creating a sinus cavity bordered by the sphenoid bone and the temporal bone of the skull. The cavernous sinus is an important structure because of its location and its contents which include the third cranial… …   Medical dictionary

  • syndrome — The aggregate of symptoms and signs associated with any morbid process, and constituting together the picture of the disease. SEE ALSO: disease. [G. s., a running together, tumultuous concourse; (in med.) a concurrence of symptoms, fr. syn,… …   Medical dictionary

  • Jefferson fracture syndrome — Jef·fer·son fracture, syndrome (jefґər sən) [Sir Geoffrey Jefferson, English neurosurgeon, 1886–1961] see under fracture, and see cavernous sinus syndrome, under syndrome …   Medical dictionary

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