1. Brain tumor - children  (Trust Mark: Doctor-Reviewed)
A primary brain tumor is a group (mass) of abnormal cells that start in the brain. This article focuses on primary brain tumors in children. See also: Brain tumor - metastatic (cancer that has spread to the brain; Brain tumor - adults.• Reviewer: James R. Mason, MD, Oncologist, Director, Blood and Marrow Transplantation Program and Stem Cell Processing Lab, Scripps Clinic, Torrey Pines, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.