Meningeal Diverticulum

Also known as intrasacral meningocele; a type of meningeal cyst that is filled with cerebral spinal fluid and does not contain nerves. They are found in the bottom of the spinal canal or spinal sac inside the sacrum. Spinal fluid from the spinal canal enters the intrasacral meningocele through an opening. These cysts can be large and fill the entire sacral cavity and cause extensive compression of sacral nerves and cause extensive bone erosion of the sacrum.