GOOD NEWS: We have fixed the DICOM uploading problem. New cases should work fine. More info

Brain herniation into giant arachnoid granulation of the sigmoid sinus

Case contributed by Yves Leonard Voss
Diagnosis certain


Non-specific headache.

Patient Data

Age: 20 years
Gender: Female

A large arachnoid granulation projects into the left sigmoid sinus into which herniates part of the interior temporal lobe. No edema. No evidence of intracranial hypertension.

Case Discussion

Unusually large brain herniation into a giant arachnoid granulation of the left sigmoid sinus.

In the scientific literature, there appears to be an ongoing debate on the clinical significance of these lesions in patients with headaches, epilepsy or intracranial hypertension.

Caution is advised in patients with planned transvenous neurointerventional procedures, and these lesions should not be mistaken for dural venous sinus thrombosis.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.