A right frontal craniotomy has been performed, with a resection cavity in the medial right frontal lobe containing a mixture of fluid, gas and a small volume of acute blood. Vasogenic oedema is seen in the white matter of the right frontal lobe, extending into the corona radiata and centrum semiovale, stable compared to previous. There is associated mass effect, with mild compression of the frontal horn of the right lateral ventricle and effacement of the right cerebral convexity sulci. There is no hydrocephalus or midline shift. No acute cortical infarct. Mild periventricular white matter hypodensity in keeping with chronic small vessel ischaemia. No appreciable change in the right parietal parasagittal meningioma.