Hi, and Welcome to the forum. I see why you are concerned with a brother with MS. That raises your risk from about 1 in 800 to about 1 in 25 or 30. So, it's a major deal.
However, the neuro you saw was a dud, a dufus and falls into the category we call DUMB - Doctors with Unfounded Medical Beliefs. He doesn't know what he is talking about.
First though, I need to ask about the spinal stenosis. This can be almost an exact mimic of MS if the stenosis is severe enough to compress the spinal cord, and it could cause the symptoms you are complaining of. Depending on the degree of narrowing, that may be your answer.
Here, though is a discussion of why you should not depend on this neurologist's knowledge of MS.
Anxiety does not cause specific localized symptoms. Using that to explain neurologic symptoms when you don't know the cause is the product of a very mediocre mind. Perhaps you do have some anxiety. Thinking you might have MS can certainly cause this.
Or that your problems are due "to some other spinal problem". Well, now, that is certainly a lot of help. I hope he is motivated to find out what "other kind of spinal problem you have." That's his job. If he thinks it is due to compression of the cord from the cervical stenosis, then I hope he referred to for an opinion from a neurosurgeon. If not, then he hasn't done his job, has he?
A neurologist's job is only not to tell you what "isn't" causing your problem, but to work reasonably to find out what it is.
A cold leg (occurring just on one leg) and burning in the thighs could certainly be early symptoms of MS, along with a bunch of other things. Poor balance and incoordination are classic MS symptoms. MS comes up, of course, because you have it in the family.
(your) balance and coordination would never be this good if (you) had MS. Oh, Poppycock!! This guy knows nothing about MS except something he read in a list somewhere. Balance and coordination are not always affected in MS. Some people have problems and some don't. MS doesn't have rules about which symptoms someone gets and when they happen and how severe they are. Many thousands of people with MS don't have balance problems, especially early in the disease.
Did you have an MRI of the brain and cervical cord? If you had both, then it becomes less likely that you have MS just on a statistical basis. But we know that MS with a normal MRI is possible, seen early in 5% or so. However, there are few neurologists who will diagnose MS with a negative MRI. One of the things you might want to check is the power of the machine. Open machines are typically too low to consistently show the smaller MS lesions. Old machines are often too weak also. No, a negative MRI is NOT conclusive. It sounds like this guy is willing to write off the 1 in 20 people who might have a negative MRI - sounds lazy.
I don't think that what you need is another MRI unless you haven't had at least both one of the brain and of the cervical spine. What you need is a doctor that knows something more about multiple sclerosis.
When he did the neuro exam, which should have been lengthy (30 or 40 minutes) did you have any abnormal findings like reflexes that werre too hyper, or balance problems or decreased sensation in your legs where you feel the burning?
Did this yahoo send a batch of blood tests looking for other reasons that you might have these problems? like a CBC, ESR, HgA1C, ANA, B12, VDRL, at least? The burning sensation is called a paresthesia. We have a Health Page on this you might want to read.
http://www.medhelp.org/health_pages/Multiple-Sclerosis/Paresthesias---Things-That-Go-BUZZ-in-the-Night/show/378?cid=36
Is your leg truly cold or does it feel cold? If it is truly cold, he should have referred you for some vascular studies to make sure the circulation is okay. If it feels cold, but isn't, it is another paresthesia.
Should you have had contrast? The Protocol for MRI for MS recommends that contrast be used. However, it truly would be unusual for a person to have lesions that would only show up after contrast - possible, but unusual. Contrast is most useful in showing how active the inflammation is that causes the lesion in the first place.
I think you should seek a different opinion from someone a little more conversant with how MS really presents. And he sounds like he worships the almighty MRI which is a good, but imperfect tool to be used alongside a thorough history and physical exam. The MRI cannot be used in place of a good brain.
Does it sound to me like you might have MS? I can't tell, you have suspicious symptoms and a positive family history, but the diagnosis (or exclusion) of MS takes a lot more than it appears this neurologist appears to have given you.
I hope to hear more of your story.
Quix, MD