The tallest man in America, he stood 7 feet 8 inches (2.35 meters), has died of a heart problem at the age of 38, his mother said on Facebook.
Ukrainian-born Igor Vovkovinskiy had a condition called pituitary gigantism that caused excessive secretion of growth hormone.
Two surgeries saved his life but failed to stop his growth.
At age 27, Guinness World Records declared Vovkovinskiy the tallest person in America.
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