question: My niece s son has been waking at 5:30am every morning for the last month, vomiting. He is a pre-teen in middle school. He has stopped eating because he doesn t want to vomit anymore, and is losing weight. His doctor has not found a cause for this. His grandfather, my younger brother, died of a brain tumor, a glioma. Is it possible for the grandson to have one also? My daughter had one removed several years ago, also a benign glioma. She was told that they run in families.