The world's tallest man has finally stopped growing at 8ft 3ins after undergoing treatment.Sultan Kosen, 29, suffers from acromegaly — a condition triggered by a tumour in the pituitary gland.It leads to over-production of growth hormones, which can cause gigantism if it starts before puberty.But Turkish Kosen seems to have been helped by scientists at the university of Charlottesville, Virginia, US.He began treatment in May 2010, when he was placed on a new medication that helps control the production of growth hormone.Medic Mary Lee Vance said: "Treating someone 8ft 3in tall is no different from treating someone 5ft 10in tall. The important thing is to stop the production of the excess growth hormone."Around three months ago, Kosen's doctors in Turkey said he had finally stopped growing.The specialised treatment has seen the University of Virginia mentioned in the 2012 edition of Guinness World Records, alongside Kosen's entry as the tallest living male.One of his doctors, neurosurgeon Jason Sheehan, said: "I'm most pleased that we were able to help Sultan. If he had continued to grow, it would have been life-threatening."