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Differential diagnosis of suspected
multiple sclerosis:
a consensus approach
• DH Miller, BG Weinshenker, M Filippi, BL
Banwell, JA Cohen, MS Freedman, SL
Galetta,M Hutchinson, RT Johnson, L
Kappos, J Kira, FD Lublin, HF McFarland,
X Montalban,H Panitch, JR Richert, SC
Reingold and CH Polman
• Multiple Sclerosis 2008; 14: 1157–1174
• © SAGE Publications 2008
introduction
• Diagnosis of multiple sclerosis (MS) requires
exclusion of diseases that could better explain
the clinical and paraclinical findings.
• A systematic process for exclusion of alternative
diagnoses has not been defined.
• An International Panel of MS experts developed
consensus perspectives on MS differential
diagnosis using available literature and
consensus.
Methods
• International Task Force composition and
mission
• International Advisory Committee on Clinical
Trials in MS of the US National MS Society use
to address the principle of “no better
explanation”for a suspected MS clinical
presentation.
• 18 international (UnitedStates, Canada, Europe,
Japan) experts in the field of demyelinating
disease with differing clinical and research
expertise in(neurology,ophthalmology,infectious
disease, MRI)
objectives
• recommendations for
1) clinical and paraclinical red flags suggesting alternative
diagnoses to MS;
2) more precise definition of “clinically isolated
syndromes” (CIS), often the first presentations of MS or
its alternatives;
3) algorithms for diagnosis of three common CISs
related to MS in the optic nerves, brainstem, and spinal
cord; and
4) a classification scheme and diagnosis criteria for
idiopathic inflammatory demyelinating disorders of the
central nervous system.
Task Force work plan
• three working groups
• Series of conference calls and subgroup
meetings over a year and a meeting of the
full Task Force in February2007.
• Opinion-based consensus
• Diagnostic evaluation strategies apply to individuals with:
• 1) Clinical, laboratory, and imaging features that are “classic”
for MS and where no features strongly suggest an alternative
diagnosis. MS is likely. Additional examinations or tests beyond
those that satisfy the McDonald criteria for MS are likely
unnecessary.
2) Features that are compatible with MS but occur in the
presence of other features (red flags) that suggest a possible
alternative diagnosis. MS can
only be diagnosed after tests to exclude alternative diagnoses.
In equivocal situations, repeated imaging and laboratory tests
over a period ofobservation may be advisable before reaching a
conclusive diagnosis.
3) Clinical and/or paraclinical red flags that point to a non-MS
diagnosis. MS is improbable. Efforts should be directed at
defining the alternative condition, especially when treatable.
4) Clinical and/or paraclinical findings that suggest the presence
of MS with another superimposed disorder. Appropriate
imaging and laboratory tests should be performed to confirm
the coexistence of the two conditions.
Exclusion of diagnostic alternatives
• One subgroup reviewed selected literature relating to demographics
, general clinical and neurological findings, paraclinical and
laboratory findings (including various imaging techniques and
laboratory tests including serum and cerebrospinal fluid [CSF]
analyses and evoked potentials) of a spectrum of diseases that
might be reasonably considered in the differential diagnoses for MS.
• a table of 79 demographic, clinical, laboratory, and imaging features
was prepared. The table was rated independently by the six
subgroup members on a 1–5 scale to classify these characteristics
as major red flags (rating 4 or 5) that point fairly definitively to a
specific non-MS alternative diagnosis or as minor red flags (rating 1
or 2), which suggest that a disorder other than MS should be
considered. An intermediate score (rating 3) indicated
uncertainty.Scores on each finding from each rater were summed
and standard deviations (SD) were calculated for each item (a high
SD represents a low degree of concordance among raters).
• .
• Potential 79 red flags were then classified into three
groups according to the following criteria:
• Major red flags: total score ≥24 or total score of
23 and no more than one individual score of 3(SD ≤
0.41).
• Intermediate red flags, indicating a lack of agreement
among the raters about the weighting:total score of ≥13
and ≤23 with more than one individual rating of 3 (SD ≥
4.1).
• Minor red flags: total score ≤12 or total score of 13 with
not more than one individual score of 3(SD ≤ 0.41).
• 36 major red flags were identified that point fairly
definitively to a non-MS alternative diagnosis, the
majority of which are clinical in nature.
• Eleven minor red flags were identified that suggest while
MS is a possible diagnosis, a disorder other than MS
should be considered, and that a decision cannot be
made simply based on the noted assessment alone.
• An additional 32 clinical, paraclinical, and laboratory
assays, many of which are imaging findings, were
determined to be of intermediate weight
Diagnostic algorithms for common
initial isolated
syndromes suggestive of MS
• A second subgroup focused on CISs that
are frequently seen as a first presentation
of disease that is eventually diagnosed as
MS
• the subgroup developed diagnostic
algorithms for three of the most typical
CISs (optic neuropathy,brain stem, and
spinal cord syndromes
Defining and classifying CIS
• CIS should be defined as a monophasic
presentation with suspected underlying
inflammatory demyelinating disease.
• “Monophasic presentation” implies a single
clinical episode at first presentation that is of
relatively rapid onset. Multiple simultaneous
clinical/ paraclinical presentations (representing
dissemination in space) are possible, although
dissemination in time should not be evident.
Four classes of CIS can thus be defined .
Differentiating MS from non-MS
IIDDs
• A third subgroup evaluated clinical,
demographic, and paraclinical factors that
differentiate prototypic MS from “variants,”
such as NMO and ADEM, and proposed
consensus criteria for their diagnosis in
light of recent data on specific imaging
features and biomarkers.
conclusions
• range of diseases that must be excluded to make a diagnosis of MS
is wide.
• conclusions and recommendations are largely consensus driven
and should be assessed in prospective clinical studies.
• Each red flag was rated by the Panel in isolation and not in a larger
clinical and/paraclinical context.
• Defining sets of symptoms/signs and red flags that would increase
the diagnostic confidence in making a diagnosis of MS versus other
conditions is a high research priority.
• relative prevalence of disorders in a specific geographic area or
population should be considered in reaching a diagnosis.
• Regional ethnically based differences in disease definition.
• Disease biomarkers will aid enormously in differential diagnosis.
Thank you
Differential diagnosis of suspected multiple sclerosis

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Differential diagnosis of suspected multiple sclerosis

  • 1. Differential diagnosis of suspected multiple sclerosis: a consensus approach • DH Miller, BG Weinshenker, M Filippi, BL Banwell, JA Cohen, MS Freedman, SL Galetta,M Hutchinson, RT Johnson, L Kappos, J Kira, FD Lublin, HF McFarland, X Montalban,H Panitch, JR Richert, SC Reingold and CH Polman • Multiple Sclerosis 2008; 14: 1157–1174 • © SAGE Publications 2008
  • 2. introduction • Diagnosis of multiple sclerosis (MS) requires exclusion of diseases that could better explain the clinical and paraclinical findings. • A systematic process for exclusion of alternative diagnoses has not been defined. • An International Panel of MS experts developed consensus perspectives on MS differential diagnosis using available literature and consensus.
  • 3. Methods • International Task Force composition and mission • International Advisory Committee on Clinical Trials in MS of the US National MS Society use to address the principle of “no better explanation”for a suspected MS clinical presentation. • 18 international (UnitedStates, Canada, Europe, Japan) experts in the field of demyelinating disease with differing clinical and research expertise in(neurology,ophthalmology,infectious disease, MRI)
  • 4. objectives • recommendations for 1) clinical and paraclinical red flags suggesting alternative diagnoses to MS; 2) more precise definition of “clinically isolated syndromes” (CIS), often the first presentations of MS or its alternatives; 3) algorithms for diagnosis of three common CISs related to MS in the optic nerves, brainstem, and spinal cord; and 4) a classification scheme and diagnosis criteria for idiopathic inflammatory demyelinating disorders of the central nervous system.
  • 5. Task Force work plan • three working groups • Series of conference calls and subgroup meetings over a year and a meeting of the full Task Force in February2007. • Opinion-based consensus
  • 6. • Diagnostic evaluation strategies apply to individuals with: • 1) Clinical, laboratory, and imaging features that are “classic” for MS and where no features strongly suggest an alternative diagnosis. MS is likely. Additional examinations or tests beyond those that satisfy the McDonald criteria for MS are likely unnecessary. 2) Features that are compatible with MS but occur in the presence of other features (red flags) that suggest a possible alternative diagnosis. MS can only be diagnosed after tests to exclude alternative diagnoses. In equivocal situations, repeated imaging and laboratory tests over a period ofobservation may be advisable before reaching a conclusive diagnosis. 3) Clinical and/or paraclinical red flags that point to a non-MS diagnosis. MS is improbable. Efforts should be directed at defining the alternative condition, especially when treatable. 4) Clinical and/or paraclinical findings that suggest the presence of MS with another superimposed disorder. Appropriate imaging and laboratory tests should be performed to confirm the coexistence of the two conditions.
  • 7. Exclusion of diagnostic alternatives • One subgroup reviewed selected literature relating to demographics , general clinical and neurological findings, paraclinical and laboratory findings (including various imaging techniques and laboratory tests including serum and cerebrospinal fluid [CSF] analyses and evoked potentials) of a spectrum of diseases that might be reasonably considered in the differential diagnoses for MS. • a table of 79 demographic, clinical, laboratory, and imaging features was prepared. The table was rated independently by the six subgroup members on a 1–5 scale to classify these characteristics as major red flags (rating 4 or 5) that point fairly definitively to a specific non-MS alternative diagnosis or as minor red flags (rating 1 or 2), which suggest that a disorder other than MS should be considered. An intermediate score (rating 3) indicated uncertainty.Scores on each finding from each rater were summed and standard deviations (SD) were calculated for each item (a high SD represents a low degree of concordance among raters). • .
  • 8. • Potential 79 red flags were then classified into three groups according to the following criteria: • Major red flags: total score ≥24 or total score of 23 and no more than one individual score of 3(SD ≤ 0.41). • Intermediate red flags, indicating a lack of agreement among the raters about the weighting:total score of ≥13 and ≤23 with more than one individual rating of 3 (SD ≥ 4.1). • Minor red flags: total score ≤12 or total score of 13 with not more than one individual score of 3(SD ≤ 0.41).
  • 9. • 36 major red flags were identified that point fairly definitively to a non-MS alternative diagnosis, the majority of which are clinical in nature. • Eleven minor red flags were identified that suggest while MS is a possible diagnosis, a disorder other than MS should be considered, and that a decision cannot be made simply based on the noted assessment alone. • An additional 32 clinical, paraclinical, and laboratory assays, many of which are imaging findings, were determined to be of intermediate weight
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  • 16. Diagnostic algorithms for common initial isolated syndromes suggestive of MS • A second subgroup focused on CISs that are frequently seen as a first presentation of disease that is eventually diagnosed as MS • the subgroup developed diagnostic algorithms for three of the most typical CISs (optic neuropathy,brain stem, and spinal cord syndromes
  • 17. Defining and classifying CIS • CIS should be defined as a monophasic presentation with suspected underlying inflammatory demyelinating disease. • “Monophasic presentation” implies a single clinical episode at first presentation that is of relatively rapid onset. Multiple simultaneous clinical/ paraclinical presentations (representing dissemination in space) are possible, although dissemination in time should not be evident. Four classes of CIS can thus be defined .
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  • 23. Differentiating MS from non-MS IIDDs • A third subgroup evaluated clinical, demographic, and paraclinical factors that differentiate prototypic MS from “variants,” such as NMO and ADEM, and proposed consensus criteria for their diagnosis in light of recent data on specific imaging features and biomarkers.
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  • 27. conclusions • range of diseases that must be excluded to make a diagnosis of MS is wide. • conclusions and recommendations are largely consensus driven and should be assessed in prospective clinical studies. • Each red flag was rated by the Panel in isolation and not in a larger clinical and/paraclinical context. • Defining sets of symptoms/signs and red flags that would increase the diagnostic confidence in making a diagnosis of MS versus other conditions is a high research priority. • relative prevalence of disorders in a specific geographic area or population should be considered in reaching a diagnosis. • Regional ethnically based differences in disease definition. • Disease biomarkers will aid enormously in differential diagnosis.