Sienna and Sierra Bernal are identical twins - but Sienna is half the size of her twin sister Sierra. The blonde-haired, blue-eyed teens age 13 look so similar - but one sister has rare primordial dwarfism. Primordial dwarfism is so rare that that there are only 200 people in the world known to have the condition. Sienna is the only primordial dwarf in the world to have an average sized twin.
Kenadie Jourdin-Bromley, This tiny girl has primordial dwarfism, an extremely rare form of dwarfism that means her head and limbs are absolutely in proportion to the rest of her body, giving her a doll-like appearance. When she was born she was so tiny nurses called her Thumbelina. Most cases of short stature are caused by skeletal or endocrine disorders. It is rare for individuals affected by primordial dwarfism to live past the age of 30.
Student with Primordial Dwarfism Shines at Fort Worth School | NBC 5 Dallas-Fort Worth
primordial+dwarfism | ... and a really cool kid! (with mother Kimberly) Primordial Dwarfism
In honor of #RareDiseaseDay, meet Landen, 7. He is one of only three children in the US with primordial dwarfism, but he doesn't let his small stature affect his big personality and dreams. Meet Landen and read more about his story.