来自美国德州的21岁女孩丽兹患一种奇怪的基因疾病，使她即便每15分钟进食一次，也常年维持27公斤左右的体重。神奇的是她并没有感到任何不适，她的器官、骨骼等都是健康的。目前她吸引了很多顶级医学家对她进行研究。
In fact, the 21-year-old from Austin, Texas, must eat every 15 minutes to stay healthy。
Miss Velasquez has a rare condition which prevents her from gaining weight even though she eats up to 60 small meals a day。
Despite consuming between 5,000 and 8,000 calories daily, the communications student, has never tipped over 4st 3lbs。
"I weigh myself regularly and if I gain even one pound I get really excited," said 5ft 2 ins Miss Velasquez, who wears size triple zero clothes。
"I eat every 15-20 minutes to keep my energy levels up。
"I eat small portions of crisps, sweets, chocolate, pizza, chicken, cake, doughnuts, ice cream, noodles and pop tarts all day long, so I get pretty upset when people accuse me of being anorexic."
She was born four weeks prematurely weighing just 2lb 10oz. Doctors found there was minimal amniotic fluid protecting her in the womb。
"They told us they had no idea how she could have survived," said Miss Velasquez's mother Rita, 45, a church secretary。
Doctors speculated Lizzie might have the genetic disorder De Barsy syndrome but soon ruled it out as it became clear she did not have learning difficulties。
"They kept on trying to figure out what was wrong with her but we treated her like any other child," said Mrs Velasquez, who charted her daughter's health in dozens of notebooks。
She was taken to see genetic experts but they still could not diagnose her。
Miss Velasquez's case has fascinated doctors all over the world and she is part of a genetic study run by Professor Abhimanyu Garg, MD, at the University of Texas Southwestern Medical Center in Dallas。
Professor Garg and his team now believe Lizzie may have a form of Neonatal Progeroid Syndrome (NPS) which causes accelerated ageing, fat loss from the face and body, and tissue degeneration. People with PRS often have triangular and prematurely aged faces with a pointy nose。
He said: "I am aware of a small number of people that have similar conditions to Lizzie but each case is slightly different。
"We cannot predict what will happen to Lizzie in the future as the medical community are yet to document older people with NPS。
"However Lizzie is lucky to have healthy teeth, organs and bones so the outlook is good. We will continue to study her case and learn from her." Miss Velasquez has helped to write a book about her incredible experiences。
It is due to be released in September。
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