What is ENT Delta sign?
The empty delta sign is a CT sign of dural venous sinus thrombosis of the superior sagittal sinus, where contrast outlines a triangular filling defect, which represents thrombus. It is only described in contrast-enhanced CT, not in unenhanced scans.
What does superior sagittal sinus mean?
The superior sagittal sinus (also known as the superior longitudinal sinus), within the human head, is an unpaired area along the attached margin of the falx cerebri. It allows blood to drain from the lateral aspects of anterior cerebral hemispheres to the confluence of sinuses.
What happens if the superior sagittal sinus is damaged?
Penetrating injury of superior sagittal sinus (SSS) is very rare yet serious which can lead to morbidity and mortality. Complications such as bleeding, thrombosis, and infection are possible and should be anticipated.
What is lateral sinus thrombosis?
Septic lateral sinus thrombosis (LST) is an intracranial complication of acute/chronic suppurative otitis media, which is between 2% to 20% of the intracranial complications. Septic LST is the formation of thrombi in the sigmoid/transverse sinus and it can reach the jugular bulb and the internal jugular vein.
Is superior sagittal sinus a blood vessel?
The superior sagittal sinus is a midline vein without valves or tunica muscularis that courses along the falx cerebri, draining many of the cerebral structures surrounding it.
Where is superior sagittal sinus?
The superior sagittal sinus is one of several endothelial-lined spaces in the brain known collectively as the dural venous sinuses. It lies within the superior convex margin of the falx cerebri which attaches to the internal surface of the calvaria (in the midline).
What causes sagittal sinus thrombosis?
Septic sagittal sinus thrombosis is uncommon and occurs as a consequence of purulent meningitis, infections of the ethmoidal or maxillary sinuses spreading through venous channels, face, scalp, subdural space, compound skull fractures, or neurosurgical wound infections (rare).
What causes blood clots in sinuses?
Cavernous sinus thrombosis is usually caused by a bacterial infection that spreads from another area of the face or skull. Many cases are the result of an infection of staphylococcal (staph) bacteria, which can cause: sinusitis – an infection of the small cavities behind the cheekbones and forehead.
Does superior sagittal sinus contain blood?
The superior sagittal sinus is the largest of the venous sinuses (Fig. 39-6), and it receives blood from the frontal, parietal, and occipital superior cerebral veins and the diploic veins, which communicate with the meningeal veins.
When should you suspect venous sinus thrombosis?
If you have cerebral venous sinus thrombosis: Respond quickly to symptoms like headaches, blurry vision, fainting, losing control of a part of your body, and seizures. If you have the above symptoms, have someone take you immediately to the emergency room or call 911 for help.