The devastating effects of Prader-Willi syndrome.
Many endure the daily challenge of living with an odd-looking face in a world that often judges people by appearance.
Conditions can cause children to look dramatically diverse.
The story of doctors' attempts to treat a five-year-old Indonesian boy with the world's largest tumour.
A rare disease causes a child to age at an accelerated rate.
A man paints pictures of events he has dreamed about, years before they occur.