30th April 2024

A 65-year-old man is being investigated for dementia. History and collateral history show memory loss

A 65-year-old man is being investigated for dementia. History and collateral history show memory loss that is predominantly affecting recent memories, with preservation of long-term memory. Other cognitive domains are unaffected.  There are no hallucinations or parkinsonian features. Blood investigations are normal. A CT head and MRI head have failed to identify the dementia subtype and there is doubt over the diagnosis. Which investigation would be most appropriate to request?

Select the SINGLE most appropriate option from the list below. Select ONE option only.