Girl with childhood Alzheimer's says 'I Love You' for the last time

This is the heartbreaking moment a little girl with rare 'childhood Alzheimer's' told her mom and dad she loved them for the last time.

Keira Esposito, now eight, was diagnosed with Sanfilippo syndrome, a rare genetic condition that causes fatal brain damage, in September 2015.

The syndrome - often dubbed childhood Alzheimer's - is caused by an enzyme deficiency, which means that Keira’s body can’t break down waste products in her brain and other parts of her body.