Arachnoid granulations

Case contributed by Dr Ammar Haouimi

Presentation

Chronic headaches.

Patient Data

Age: 60 years
Gender: Male
MRI

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.

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