Acoustic Neuroma Causes. There are two types of acoustic neuroma: a sporadic form and a form associated with a syndrome called neurofibromatosis type II (NF2). NF2 is an inherited disorder characterized by the growth of noncancerous tumors in the nervous system.
1. Conventional (or classic) chordoma is the most common form of chordoma. It is composed of a unique cell type that resembles notochordal cells and can have areas of chondroid appearance. 2. Poorly differentiated chordoma is a recently identified subtype.
Primary central nervous system (CNS) lymphoma is a rare type of non-Hodgkin’s lymphoma (cancer of the lymphatic system). Your primary CNS is made up of the brain, its outer covering and the spinal cord. The lymphatic system is a key part of your immune system.
A meningioma is a tumor that forms on membranes that cover the brain and spinal cord just inside the skull. Specifically, the tumor forms on the three layers of membranes that are called meninges. These tumors are often slow-growing. As many as 90% are benign (not cancerous).
Glioma is a common type of tumor originating in the brain. About 33 percent of all brain tumors are gliomas, which originate in the glial cells that surround and support neurons in the brain, including astrocytes, oligodendrocytes and ependymal cells.