Sienna, or “Sinny,” was born with a form of primordial dwarfism that is so uncommon it has yet to be formally classified, according to the record keeping organization. Sinny stands at 4 feet ...

She was so tiny that nurses nicknamed her "Thumbelina." Doctors diagnosed Kenadie with a rare form of primordial dwarfism, which can cause behavioral impairment, respiratory disease, and digestive ...