Often, a cyst forms because of a condition that changes the normal flow of cerebrospinal fluid (CSF). The CSF can build up in the spinal cord and form a cyst.
Children who have other problems involving the brain and spinal cord often have syringomyelia, too. Many times, these related problems are present when a baby is born (congenital), such as:
Other conditions that may happen during childhood or later in life can also cause a cyst to form. These include:
Not all children with these conditions develop syringomyelia. Sometimes there is no clear cause.