👉 Meningomyelocele is a type of bone tumor that occurs in the brain. It's also known as a "brain myeloma" or a "myeloid neoplasm." The term "meningomyelocele" comes from the fact that it affects the brain, and its cells are called meningocytes. This condition can cause symptoms like headaches, nausea, and difficulty sleeping. Treatment options depend on the stage of the tumor and the patient's overall health.