👉 A neencephalon, also known as a neuroblastoma or a neuroblastoma cell, is a type of cancer that involves abnormal growth in the brain. It can cause symptoms such as seizures, difficulty speaking, and loss of vision, among others. Neencephalons are often found in children who have had a tumor removed from their brain, which may be caused by various factors such as genetic mutations or exposure to certain chemicals. They are also seen in people with certain medical conditions