Transverse myelitis is a neurological disorder caused by an inflammatory process of the grey and white matter of the spinal cord, and can cause axonal demyelination.
(http://en.wikipedia.org/wiki/Transverse_myelitis; http://www.ninds.nih.gov/disorders/transversemyelitis/detail_transversemyelitis.htm).
In the background rate calculation we will differentiate between viral and other transverse myelitis.