Child in a million. Part 2, Alex and Matthew.

The second in a six-part series following the stories of children undergoing pioneering treatments for rare medical conditions at London's Great Ormond Street Hospital. This part tells the moving stories of Alex and Matthew. Alex has a rare and potentially fatal condition known as vanishing bone disease (Gorham Stout Syndrome) which has destroyed half of his jaw. He had surgery initially to replace his jaw but the condition deteriorated and he is now undergoing a pioneering combination of chemotherapy and different medicines. Matthew was born with no pulmonary valve in his heart and had to have surgery immediately after birth. But the artificial valve he had put in his heart can only last 10 years so he now needs to get it replaced. In both cases we see surgical procedures in some depth and also follow how the families deal with their sons' illnesses.