Working closely with Dr. Kate Matthay, chief of pediatric oncology and the world's foremost leader in neuroblastomas, Our group does surgery for children with neuroblastoma. Neuroblastomas are malignant tumors that most often occur in the abdomen from the adrenal gland just above the kidney. Less frequently they are found lower in the abdomen, pelvis, chest or neck. Surgery for these tumors can be quite complex, and our group has one of the largest experiences for operating on large neuroblastomas.