Brenden Adams, the world's tallest boy, who tops 7ft.

Brenden age13, from Ellensburg, Washington, is now 7ft 4 1/2ins tall but was born a normal 7lb 4oz. At 12 months he was the size of a three year-old.
By eight he was as big as an adult but doctors didn't know what was causing his growth spurt, until they discovered a problem with his chromosomes.
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