Sigmoid sinus diverticulum is a rare vascular finding due to an opening in the bone at the area of the sigmoid sinus creating a pouch, or diverticulum. Sometimes, there may be associated stenosis. The diverticulum may present as pulsatile tinnitus. Several case reports have demonstrated that treatment or endovascular coiling of this diverticulum can provide relief for a patients' symptoms.

## Diagnosis

Sigmoid sinus diverticulum can be diagnosed either by CT, CTA, MRI or MRV. Cerebral angiography provides definitive diagnosis

![Sigmoid Sinus Diverticulum](https://www.bmc.org/sites/default/files/Patient_Care/Specialty_Care/Stroke_and_Cerebrovascular_Center/Services/Sigmoid-Sinus-Diverticulum-1.jpg)

Axial CT: Right sigmoid sinus diverticulum

![Sigmoid Sinus Diverticulum](https://www.bmc.org/sites/default/files/Patient_Care/Specialty_Care/Stroke_and_Cerebrovascular_Center/Services/Sigmoid-Sinus-Diverticulum-2.jpg)

Venogram, showing right sigmoid sinus diverticulum

![Sigmoid Sinus Diverticulum](https://www.bmc.org/sites/default/files/Patient_Care/Specialty_Care/Stroke_and_Cerebrovascular_Center/Services/Sigmoid-Sinus-Diverticulum-3.jpg)

Venogram, after coiling of the pouch, the diverticulum is closed



 

 ## Departments and Programs Who Treat This Condition

  department###  [Stroke and Cerebrovascular Center](/departments/neurology/stroke-and-cerebrovascular-center) 

 A comprehensive stroke center within the Department of Neurology providing advanced stroke treatment for ischemic and hemorrhagic stroke with expert cerebrovascular care. 

 

 

  department###  [Neurology](/departments/neurology) 

 A department providing specialized evaluation and treatment for a wide range of brain and nerve conditions, including stroke, Parkinson’s disease, epilepsy, headaches, memory loss… 

 

 

  department###  [Interventional Neuroradiology](/departments/neurology/interventional-neuroradiology) 

 A program within the Department of Neurology providing interventional neuroradiology care to diagnose and treat conditions such as aneurysms and stroke using minimally invasive, i…