There is one cancer in children for every 200 in adults, says pediatric oncologist Lucas Moreno. The most common cancers in children and adolescents are leukemias, lymphomas and brain tumors.

In the last decade, there has been a very important advance in the knowledge of what happens in tumors. But there are still not many examples of success of new drugs as has happened in adult oncology. When there is no cure, the key is to buy time. There are no population screening programs because they are tumors that grow quickly.