NOV 17, 2017 09:22 AM PST
Diagnosed: Prader-Willi Syndrome Behind this Baby's Shocking Size?
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Image Credit: AFP/Getty Images

At only 10-months-old, Luis Manuel Gonzalez, weighs in at 62 pounds (28 kilograms), or roughly the equivalent of an average 9-year-old child. Doctors are working to uncover the cause, and some speculate that a genetic condition is behind his unusual growth spurt.

At birth, Luis weighed in at around 8 pounds, with no hint of any abnormalities. But it was soon apparent that something was amiss.

At 1-month, Luis was already wearing clothes intended for 2-year-old children. “After only one month we noticed that clothes did not fit him and we had to dress him in clothes for a one-year-old, and even a two-year-old,” said Isabel Pantoja, 24, Luis’ mother, from Colima Mexico.

By two months, Luis gained nearly three times his birth weight, tipping the scale at 22 pounds.

“We saw our baby gain weight so fast. Sometimes, he could not sleep because he felt like he was suffocating due to his weight,” said Mrs. Pantoja.

The family began seriously seeking medical help when they realized Luis, the baby in the family, was quickly outgrowing and dwarfing his three-year-old brother in size.

Luis is now undergoing a series of genetic and hormone tests to pinpoint the cause of his condition. The results aren’t confirmed, but some doctors suspect Luis may have a form of Prader-Willi syndrome.

In about 70 percent of cases, Prader-Willi syndrome (PWS) is caused by the deletion of several genes located on chromosome 15. Among the biological consequences of this deletion are changes to the patient’s metabolism. Specifically, PWS patients experience a dysregulation of their hunger drive, causing them to feel a constant sense of hunger and never feeling satiated. This typically puts PWS patients at risk for obesity and type 2 diabetes at a very young age.

But a PWS diagnosis doesn’t fit with Luis’ story perfectly. The constant hunger and overeating associated with PWS usually occurs at around 2 years of age. Meanwhile, Luis is still two months shy of his first birthday. In addition, his mom reports that Luis takes in a normal amount of food, and doesn’t usually ask for more than typical for a boy his age. These details suggest a more intricate story behind Luis’ extraordinary size.

As the family is struggling to find answers, they’re asking for help. “In some cases, kids have died because of a heart attack due to being so overweight. All help given for him, small or big, is good for him,” said Mario Gonzalez, Luis’ father. The family plans to set up a bank account to receive donations.

Additional sources: Daily Mail, NY Post

  • I am a human geneticist, passionate about telling stories to make science more engaging and approachable. Find more of my writing at the Hopkins BioMedical Odyssey blog and at

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