Bilateral watershed infarct The non-contrast CT brain shown is from a patient with bilateral watershed infarct. Here, chronic ischaemic changes can be seen along the external or cortical watershed zones  (Figures 1 and 2). These “borderzones” is where the terminal vasculature of the anterior cerebral artery and ...

There are a number of causes of spontaneous parenchymal haemorrhages. These include: hypertension, vascular malformations and aneurysms, neoplasm (primary or metastatic), cerebral amyloid angiopathy, use of antiplatelet agents or anti-coagulants, blood dyscrasias and drug abuse (e.g. amphetamine and cocaine use). Parenchymal haemorrhages could also be subdivided into ...

This is a non-contrast cranial CT from a middle-aged man with multiple cardiovascular risk factors who suffered a severe ischaemic stroke involving the left middle cerebral artery territory. There was significant cytotoxic cerebral oedema as a result of the extensive infarction. The patient was operated ...