I found this paper interesting in that we have always heard the rate of depression/suicide is much higher in MS Patients.

"Changes in mood, personality, and cognitive functioning

are among the most disabling and distressing symptoms for

individuals diagnosed with MS, yet patients and their families

receive little understanding or help with these problems.

When behavioural changes are addressed, the changes are

described simply as emotional reaction to the life situation or

poor adjustment to chronic illness. Recent research, however,

indicates that there are additional risk factors to explain

the high incidence of psychiatric conditions and psychological

problems. These include side effects of steroid use for

management of exacerbations of symptoms and increasing

evidence of an organic explanation involving lesions in specific

areas of the brain"

http://ww1.cpa-apc.org:8080/publications/archives/pdf/1996/sep/rodgers.pdf