Interesting, and great news, Snoopy. I would have never thought of pelvic pain as being related to MS, but I guess it makes sense since I've heard of others with "****" (edit: "bottom") spasms from the disease.

I was just reading up on pelvic pain (curiousity got the cat) and came across this:

"The bottom of the pelvis is comprised of a series of muscles. These muscles extend from the pubic bone in the front to the tail bone in the back. Whenever we are in pain, the natural tendency is to tense up our muscles. This applies to pelvic pain as well. Often, without even realizing it, a patient is clenching the pelvic floor muscles. Over time, months or years, these muscles can go into spasm and become scarred and unable to fully relax. This condition is similar to a knot in the muscle in your back. It is not a matter of just relaxing the muscle to make the knot go away, this is impossible. Just as deep tissue massage is needed to get rid of the knots (muscle spasm and muscle fibrosis) in the back, deep tissue massage can be needed in the pelvic area. A qualified physical therapist who deals with pelvic pain and is experienced in transvaginal (through the vagina) deep tissue massage of the pelvic muscle floor is usually needed to correct pelvic muscle floor spasms. Although muscle spasms may not seem like a serious condition to some, anyone who has experienced a severe spasm in the calf knows how excruciatingly the pain can be. Imagine having this pain level constantly in the pelvic area."

http://www.pelvicpain.com/learn.html

Since we have spasms everywhere else, it's probably not too much of a stretch to consider this alternative as the "MS-reason" for your pain.

Good luck for your sister. I hope the results prove less then MS.

Cherie