The 10-year survival rate for children with cancer has risen over about a decade, the Netherlands Comprehensive Cancer Organization reported Tuesday. Compared with children diagnosed from the years of 2000 to 2004, about 33 fewer children now die from cancer a year.

Overall, out of children diagnosed from 2010 to 2014, 83.2 percent were still alive 10 years later. It was 77 percent for children diagnosed in the period from 2000 to 2004. That means that 5 in 6 children that get cancer are now alive 10 years later. A decade earlier, however, that number was 3 in 4.

The improvement, however, is not the same for every type of childhood cancer, as some remain very hard to treat. Even more so, there is still no cure for brainstem cancer- the one that sits deep in the brain.

The biggest improvement was seen in 2 cancers: myeloid leukemia and brain tumors. The survival rate from brain tumors rose to 80 percent from 67, while it also jumped to 74 from 57 percent for the myeloid leukemia.

Neuroblastoma and some bone tumors still lag. Only around 3 in 10 children with bone cancers are alive 10 years later. When it comes to neuroblastoma, that number is 4 in 10.

When it comes to brainstem tumors, however, trying to extract the tumor from deep inside a child’s brain could kill them, Wouter Kollen, director of medical care at the Princess Máxima Center in Utrecht, told NU.nl. That is mainly because that type of tumor sits in the brain region responsible for controlling temperature and breathing. Chemotherapy is also not very successful in this case, as it can barely reach that brain region.