What This Means
This case report describes an older man who developed confusion, memory problems, falls, and loss of bladder control over several months. These problems became worse over two weeks. Routine tests, including blood work, thiamine levels, and a neurological exam, did not point to an obvious cause such as infection, electrolyte problems, or alcohol or drug use.
He was admitted for monitoring and had a series of brain scans, including CT, CT angiography, and MRI. While in hospital he developed facial twitching, more drowsiness, and seizures, and he then underwent a detailed blood vessel imaging study called digital subtraction angiography. The title indicates the cause was an abnormal connection between an artery and a vein in the brain's covering (a dural arteriovenous fistula) that affected deep brain structures called the thalami and produced a dementia-like illness.
This research suggests that a rapidly progressing dementia-like condition with seizures may sometimes come from a blood vessel abnormality rather than a degenerative brain disease. The abstract does not include the scan findings, treatment, or outcome, so those details cannot be drawn from it.