Right sided extradural haematoma measuring up to 16 mm in thickness with associated right cerebral sulcal effacement, right lateral ventricular effacement and 4 mm of midline shift to the left. Impending right uncal herniation. Swirling low density within the haematoma (swirl sign) consistent with ongoing active bleeding from the middle meningeal artery. The haematoma crosses the coronal suture which is unusual for extra-dural haematomas but can occur in the setting of skull fracture or suture diastasis. Right frontal scalp laceration and mildly depressed right frontal skull fracture. There is involvement of the right frontal sinus with an additional small volume of extra-axial haemorrhage underlying this.