That's pretty wild... I've never heard of this one (you think after 10 years it'll be breaking news everywhere already.) I don't know if this is really something that defeats the reaper, as the cells may still be aging yet somehow growth has been stunted. It'll certainly help against *something* if we come to understand what's going on. Maybe it'll aid against cancer if we can get the cancer cells to a period of stunted growth like what's happening to the poor girl here.
In the meantime, it's also encouraging that the parents are hanging on and taking care of their girl to the best of their abilities and treat her as part of the family!