As a pediatric oncologist at the Princess Máxima Center, I am involved with acute care on the nursing wards and outpatient treatment for all patients with blood cancers. I treat children with Langerhans Cell Histiocytosis (LCH) and Acute Lymphatic Leukemia (ALL). As the chairperson for the Langerhans Cell Histiocytosis protocol committee, I try to improve the treatment of children with LCH further in collaboration with (inter-) national colleagues. I do this as a researcher in clinical and pre-clinical studies. I am also the Chef de Clinique for hematology-oncology outpatient treatment.