<unk>  is a blood clot in the<unk><unk> . The<unk><unk>  is a cavity at the base of the brain that contains a vein, several nerves, and other structures. The vein carries deoxygenated blood from the brain and face back to the heart.
The vein and cavity run between the large bone at the base of the skull (sphenoid bone) and temporal bone (near the temple).
Cavernous sinus thrombosis
Labyrinthitis
Orbital cellulitis
Retinal migraine
Periorbital cellulitis
Endophthalmitis
Endogenous endophthalmitis
Arachnoiditis