Intracerebral haemorrhage. This is a primary intracerebral haemorrhage occurring in the right parietal and temporal lobes of a 75 year old man. In this case, the haemorrhage has extended into the right lateral ventricle (yellow arrow) and the third ventricle (orange arrow). Note the significant midline shift. These lobar haemorrhages may also extend into the subarachnoid or subdural space. They tend to occur in elderly patients; predisposing factors include anticoagulation and a condition called cerebral amyloid angiopathy. In this case, the patient was being worked up by a haematologist for thrombocytopaenia.