A THIRTEEN-year-old boy, who once weighed 423llbs, has lost over half of his body weight thanks to weight loss surgery and is now looking to have his excess skin removed. Once known as the heaviest child in the world, Arya Permana, from Karawang, West Java, Indonesia is now an active 13-year-old after losing an incredible 220lbs. When he was 10-years-old - and at his heaviest - Arya weighed 423lbs (over 30 stone or 192kg) – the same as six boys his same age. But for all the ways that his life has improved, the weight loss has resulted in a large amount of excess skin on Arya’s arms and chest in particular. The teenager is hoping to have skin removal surgery, at the Hasan Sadikin Hospital in Bandung, after completing the national exams.