Definition

Noun (Anatomy): A cavernous sinus is one of a pair of large, irregularly shaped venous channels (sinuses) located on either side of the body of the sphenoid bone in the middle cranial fossa. It is a major structure that drains deoxygenated blood from the brain and face back toward the heart. It is notable for its trabeculated, "cavernous" internal structure and for containing several critical neurovascular structures, including the internal carotid artery and cranial nerves.

Usage Examples

• Noun:
  • A blood clot in the cavernous sinus is a serious medical condition known as cavernous sinus thrombosis.
  • The internal carotid artery passes through the cavernous sinus.
  • Surgeons must be extremely careful when operating near the cavernous sinus due to the vital nerves and blood vessels it contains.

Advanced Usage

• "Cavernous sinus syndrome": A clinical condition resulting from pathology (e.g., tumor, thrombosis, aneurysm) affecting the cavernous sinus, characterized by a combination of symptoms like ophthalmoplegia (eye movement paralysis), facial sensory loss, and eye protrusion.
  • The patient's sudden double vision and headache were diagnosed as cavernous sinus syndrome caused by an infection.

Variants and Related Words

• Cavernous sinus (n): The full and more commonly used clinical term for .
• Venous sinus (n): A general term for any of the endothelial-lined channels that drain venous blood from the brain.
• Dural venous sinus (n): The specific type of venous sinus, like the cavernous sinus, located between layers of the dura mater (the brain's tough outer membrane).

Synonyms

• There are no direct common synonyms for this precise anatomical structure. In medical contexts, it is exclusively referred to as the cavernous sinus.

Related Phrases

• Cavernous sinus thrombosis (n): The formation of a blood clot within the cavernous sinus.
• Carotid-cavernous fistula (n): An abnormal connection between the carotid artery and the cavernous sinus.

Noun

1. either of a pair of large venous sinuses in the cranial cavity