YouTuber Daniel Coleman must cope with an unimaginable loss. His son Isaac died at just 14 years old. He struggled with a rare hereditary disease throughout his life.

A children’s YouTube star has announced the heartbreaking death of his son, who lived with a genetic disease.

Last December, the Colemans shared Isaac’s stage 3 cancer diagnosis with the world, with Daniel clarifying that the diagnosis was not unexpected since his son had the rare genetic disorder Fanconi ane...