Benign intracranial hypertension
Idiopathic (benign) intracranial hypertension. This woman presented with headaches and was found to have papilloedema at fundoscopy. MRI shows an abnormal appearance to both optic nerve, with CSF extending along the nerves into the orbits (yellow arrow). You can also see that the nerves are bulging into the globes (orange arrow). You can compare these appearances to the normal example on the right. These findings indicate intracranial hypertension. An underlying cause was not identified, and the patient required ventricular shunting to relieve her symptoms.