Subdural hygroma
- A 70-year-old patient with gait disturbance and cognitive impairment underwent an intraventricular shunt for normal pressure hydrocephalus (albeit without classical imaging appearances).
- The patient had a persistent headache post-operatively. On the third post-operative day, an MRI showed bilateral subdural collections containing small regions of susceptibility (due to blood product) that resulted in effacement of the lateral ventricles.