New figures from the Alzheimer's Society show that, in some parts of the East Midlands, just four in ten people with dementia are being diagnosed with the condition.
The charity says it's disappointing that the number of cases being spotted varies so greatly between different parts of the region.
Our correspondent Peter Bearne has been talking to one woman who says health professionals repeatedly refused to accept her elderly mother had the disease.
More top news
Inspectors believe the discovery could turn out to the be one of the largest finds in the north of the county in recent years
Two men have been convicted of killing a Pizza Hut delivery man in Peterborough, in a botched attempt to steal three pizzas.
Four-time Olympic medallist Rebecca Addlington has officially opened the new Wyre Forest leisure centre.