Very strange vampire diseases

This is not twilight movie or any fake work. 2 brothers simon 13, and george 11 had a strange diseases that make their teeth looks like vampire. Surprisingly, they also act like vampire, avoiding sunrise and light place. As I read from dailymail, their diseases already known in medic. They call it Hypo hidrotic ectodermal displasia. Only 7000 peoples in the world that suffer from this kind of disease. Let we see their "scary" pics....