CT � Subdural hematoma: This 72-year-old man with a history of Parkinson disease presented with right-sided weakness one week after a fall. Examination revealed a left temporal hematoma, slight word finding difficulty and a right hemiparesis. This axial CT scan shows a large fluid collection along the left fronto-temporal convexity that is hypodense except for a small portion anteriorly that is hyperdense. There is midline shift with subfalcial herniation to the right. This image is suggestive of an acute-on-chronic subdural hematoma.