A 75-year-old lady presented with sudden severe headache and vomiting. Examination was normal, and CT and lumbar puncture not convincing for subarachnoid haemorrhage. Shortly thereafter, she developed painless diplopia. Examination confirmed right third cranial nerve palsy plus homonymous left inferior quadrantanopia. Urgent cerebral MRI with angiography was requested to assess for a possible p...

Vascular anomalies, either aneurysmal or arteriovenous, figure predominantly as the causative lesions in spontaneous subarachnoid haemorrhage. Such haemorrhage as the presenting feature of intracranial tumour, although much rarer, is sufficiently well recognized not to cause diagnostic difficulties; _ ,J ablost invariably some evidence of a space-occupying lesion, if not of a pathological circu...