Arachnoid granulations

Case contributed by Dr Ammar Haouimi


Chronic headaches.

Patient Data

Age: 60 years
Gender: Male

There are two small nodules within the distal transverse sinuses measuring (16 x 13 mm) on the right and (14 x 8 mm) on the left. They display a low signal on T1 and high signal on T2 with no enhancement (filling defects) on postcontrast sequences.

Case Discussion

Arachnoid granulations or Pacchionian granulations are a common incidental finding and 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.