We thought Minecraft was making our son ill – but the truth was much worse: Parents’ agony as nine-year-old boy is told his ‘next seizure could be his last’ after being diagnosed with one of the world’s rarest disease

William Howard, nine, was told by doctors his initial symptom, a twitch in his right leg, could be down to stress from playing Minecraft. But investigations show he has mitochondrial disease.William Howard, nine, was told by doctors his initial symptom, a twitch in his right leg, could be down to stress from playing Minecraft. But investigations show he has mitochondrial disease.Read MoreHealth News | Mail Online