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-   -   Accuracy of MRI in Diagnosing MS (https://www.neurotalk.org/multiple-sclerosis/2613-accuracy-mri-diagnosing-ms.html)

Nancy T 10-15-2006 10:40 AM

One radiologist--who read three of my scans--wrote just three or four sentences, not giving sizes except to say "small" lesions, nor locations except to say "scattered" and "in the deep white matter." On the first scan, done to rule out a hearing-nerve tumor, he wrote a somewhat longer report detailing what all he DIDN'T find, all I think relating to the possibility of a tumor.

The report of the other scan I had, read by a different radiologist, did specify number and sizes but was worded in an ambiguous (to me) way so that you couldn't tell whether he saw two lesions or four, whether the largest were 2 or 4 mm. Immaterial anyway, since they were nondiagnostic.

Rex, I may have asked this before, but what does it mean when they write at the end of the report "Electronically verified by So-and-So, MD", a different person from the one who wrote the report?

Nancy T.

kingrex 10-15-2006 12:03 PM

Quote:

Originally Posted by Nancy T (Post 25755)
One radiologist--who read three of my scans--wrote just three or four sentences, not giving sizes except to say "small" lesions, nor locations except to say "scattered" and "in the deep white matter." On the first scan, done to rule out a hearing-nerve tumor, he wrote a somewhat longer report detailing what all he DIDN'T find, all I think relating to the possibility of a tumor.

The report of the other scan I had, read by a different radiologist, did specify number and sizes but was worded in an ambiguous (to me) way so that you couldn't tell whether he saw two lesions or four, whether the largest were 2 or 4 mm. Immaterial anyway, since they were nondiagnostic.

Rex, I may have asked this before, but what does it mean when they write at the end of the report "Electronically verified by So-and-So, MD", a different person from the one who wrote the report?

Nancy T.


Hi Nancy,

When one radiologist signs-off on another's dictation, it could mean two things. It could mean that an attending radiologist dictated the report but was not available to review it in its final form, so another radiologist is signing-off as a proxy. This is rarely done, as it effectively transfers the liability to the second radiologist, who didn't even interpret the study. I don't know of many radiologists who would like to accept the liability for another's reading, should any problems later arise. Perhaps some group practices work like this, but I don't know of any myself.

More commonly, the term applies to cases where a resident or fellow has dictated a report. In Florida, a resident or fellow cannot sign-off on a report; an attending radiologist must do so. At teaching hospitals, residents and fellows usually dictate in the presence of an attending radiologist, with whom they have studied the case prior to the actual dictation. The attending then signs-off in the electronic radiology system, often remotely via the Internet.

What sort of facility is generating these reports?

Nancy T 10-15-2006 09:10 PM

Rex--thanks for the information, that's interesting. I had guessed maybe it was a kind of teaching thing. But those MRIs were done at a regular hospital, not a teaching hospital. Without digging them up, I know at least two of the scans I had, and possibly all three, had that "electronically verified by" line, with different doctors' names, although the one who wrote the report was the same.

I do know that the neurotologist, when I first saw him three months after the rule-out-AN scan was done, asked me for a copy of the MRI report, I think wanting to see who'd read it, and nodded and said "he's a good radiologist" or something like that.

However, both the neurotologist (when he ordered a temporal-bone CT) and the otoneurologist that he trades patients with (who ordered my next MRI) specified that a particular radiologist they apparently know and like was to read the scans they ordered. These were done at standalone imaging places, but I guess they both like the same radiologist.

Nancy

pals1107 10-15-2006 10:20 PM

My studies were done at a major hospital near detroit, William beaumont hospital.
Pat

barbaraB 10-16-2006 05:53 PM

Although lesions may be caused by many things, the MRI remains a standard disgnostic tool to detect lesions. And, afterall, this disease is "multiple" "sclerosis", or evidenc of multiple locations of scarring [lesions]. Since there are numerous causes of CNS lesions, from migraines to aging, it is critical that an LP be performed. Lesions without the presence of oligoclonal bands, indicating immune involvement, could be caused by any number of events. And an exacerbation isn't necessary to detect oligoclonal bands in an LP....the immune system in a MS patient is always active.

I, too agree that the old hot bath test should be resurrected. The people who survive hot baths should doubt a dx of MS, and search further for a proper dx, IMHO.

Matt 10-16-2006 09:43 PM

They do still make a pretty big deal about temperature sensitivity, at least my doctors have.

lady_express_44 10-16-2006 09:59 PM

Quote:

Originally Posted by barbaraB (Post 26333)
Since there are numerous causes of CNS lesions, from migraines to aging, it is critical that an LP be performed. Lesions without the presence of oligoclonal bands, indicating immune involvement, could be caused by any number of events.

With all due respect Barbara, I do not agee that a LP is necessary for a MS dx. It is just ONE of the means of getting a dx, and it carries a low but serious risk.

This is a paper put out by the NMSS, last update in Feb/06:

http://www.nationalmssociety.org/pdf.../diagnosis.pdf

I had a LP back in 1991, and refused any further testing after that very difficult ordeal; not even a MRI. The LP did not confirm MS for me, but I have since been dx with MS (by history and a MRI).

An LP should be a last ditch effort for dx, IMHO.

Cherie

SallyC 10-17-2006 01:06 PM

With all due respect, Cherie, I do not agree with your not agreeing with Barbara..:D :p

An LP is just as necessary as an MRI, EPs or any other DX tool, for DXing MS. What one tells you the other doesn't, and visa versa. Actually, to me, a LP, showing O-bands, is more definitive of MS than a MRI showing lesions.

I was DX in 1976, with a Myeliogram(sp), showing the protein and o-bands. This shows that you have demyelinization happening. Didn't have MRIs in the old days:rolleyes:. I may or may not have had lesions, but lesions are not, in themselves, proof of MS.

Quote:

Originally Posted by lady_express_44 (Post 26467)
With all due respect Barbara, I do not agee that a LP is necessary for a MS dx. It is just ONE of the means of getting a dx, and it carries a low but serious risk.

This is a paper put out by the NMSS, last update in Feb/06:

http://www.nationalmssociety.org/pdf.../diagnosis.pdf

I had a LP back in 1991, and refused any further testing after that very difficult ordeal; not even a MRI. The LP did not confirm MS for me, but I have since been dx with MS (by history and a MRI).

An LP should be a last ditch effort for dx, IMHO.

Cherie


barbaraB 10-17-2006 01:20 PM

The risks associated with an LP are minimal----certainly no more than taking anaesthesia during childbirth. IMHO, the more tests performed the better to eliminate potential non-MS diseases. Although MS is now treatable [in some people's minds anyway], the treatments are invasive, expensive and not without their own risks.

I'd like to know as much as possible about what's going on with my body. I had my first LP the day after my first very positive MRI, and my second some 10 years later, as part of the prelim exam for a drug trial. In spite of never having exacerbations [PP], my LPs were both positive.

If my lesions were only due to TIAs [which could be possible as I've had high BP since childhood], the treatment approach would be quite different.

A little more information never killed anyone;)

lady_express_44 10-17-2006 06:38 PM

Quote:

Originally Posted by SallyC (Post 26669)
An LP is just as necessary as an MRI, EPs or any other DX tool, for DXing MS. What one tells you the other doesn't, and visa versa. Actually, to me, a LP, showing O-bands, is more definitive of MS than a MRI showing lesions.

Quote:

Originally Posted by barbaraB (Post 26673)
The risks associated with an LP are minimal----certainly no more than taking anaesthesia during childbirth.

A little more information never killed anyone;)

The link I provided indicated that there were several dx tools used, one of which was a LP.

Sometimes a LP is helpful, but MANY times it is not especially in the early years with this disease (it seems). I remember we did an (informal) survey of dx MSers on OBT; approx. 50% did not have O bands upon testing, or never had a LP but still had a definitive dx.

I had a terrible time with my LP, and ended up in the Brain Trauma unit (under 24 hr care) for a week. It was, by far, the worst experience in my life (natural childbirth/52 hrs of labour/drip inducement was a CAKE-WALK in comparison).

I realize I am one of the very few unlucky ones, but there is a REAL risk with this procedure. If it is deemed absolutely necessary, then I guess people have to do it. However, there are plenty of other tests that I would recommend they have done before agreeing to a LP.

As I said, in the end I got a dx without those results anyway.

Cherie


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