4. Multiple Sclerosis Diagnosis
4
• Diagnosis relies on clinical judgment.
• MS is extremely variable.
• There is no specific test.
• The diagnosis has dramatic implications.
6. How to diagnose MS?
6
Clinical:
• History and examination.
• Evidence of CNS
involvement.
• Dissemination in space
and time.
Paraclinical:
• Neuroimaging.
• Evoked potentials.
• CSF analysis.
8. Diagnostic Criteria
• Dawson criteria: 1916
• Schumacher criteria: 1965
• Poser criteria: 1983
• McDonald criteria: 2001
• McDonald criteria: 2005
• McDonald criteria: 2010
All criteria require dissemination in time and space
9. Summarized Diagnostic Criteria
1. Dissemination in space: Objective evidence
of neurological deficits localized to two
separate parts of the CNS
2. Dissemination in Time:
Onset of neurological deficits separated by
at least one month
3. Rule out other explanations!
2010
2014
10. Diagnostic Criteria 2005
• Incorporate use of MRI
• Clinically Isolated Syndrom + MRI
Dissemination in space + MRI
Dissemination on time =
Earlier MS Diagnosis
August
DIS
DIT
November
11. New Diagnostic Criteria 2010
• Incorporate use of MRI
• Clinically Isolated Syndrom + MRI
Dissemination in space + MRI
Dissemination on time =
Earlier MS Diagnosis
August
DIS
DIT
August
21. Diagnostic tools
21
CSF examination:
• Abnormal in 85% to 90% of patients with MS.
• Elevated total IgG, an elevated IgG ratio, an increased IgG synthesis
rate,
• Presence of two or more oligoclonal bands in the CSF that are not
present in a simultaneously drawn serum sample
22. CSF examination
22
IgG index:
• [IgGCSF/albuminCSF]/[IgGserum/albuminserum]
MS patients elevated IgG index (>1.7). (normal is <0.77)
25. Mental map for diagnosis of MS
25
Clinical/Paraclinical/Imaging
Typical for MS
Fulfills Criteria
Atypical for MS
Red Flags Present
Work Up for Alternative
Diagnoses
Clinical/Imaging Follow
Up
Alternative Diagnosis
Established
Further clinical/imaging
typical for MS
MS Diagnosis
Typical for MS
not Fulfilling Criteria
Clinical/Imaging Follow
Up
27. Red flags
27
• Major red flags point fairly definitively to a non-MS diagnosis
• Intermediate red flags point to poor agreement and uncertainty
among raters about the weighting of the flag for differential
diagnosis in MS
• Minor red flags suggest that a disease other than MS should be
considered and fully explored, but an MS diagnosis is not excluded.
41. Clinical Red Flags
41
• Fever at the onset.
• Dermatologic involvement , other than psoriasis.
• Endocrinologic disease other than autoimmune
thyroid disease.
47. Labs UPON red flags
47
CNS Inflammatory/Autoimmune Disease:
• ANA,CRP, Anti DS DNA,C3,C4, ANCA panel, Chest CT, eye exam,
conjunctival biopsy, Pathergy skin test (Behcet's), Skin biopsy
if suspicious rash present, CTA, angiogram .
CNS Infection:
• Brucella antibodies, HIV test, HTLV1, and CSF antibodies (if isolated
myelopathy with a lesion on spinal MRI), ESR, small bowel biopsy
for whipple .
48. Labs UPON red flags
48
CNS Neoplasm/ Infiltrative Disorder:
• CSF cytology and flow cytometry, CXR, CT Chest AbdomenPelvis,
Pelvic ultrasound, Mammogram, LDH, skeletal series, bone scan,
Brain biopsy.
CNS vasculopathy/Ischemic Disease:
• Notch3 mutations in CADASIL , MRA, CTA, standard angiogram,
thrombophilia panel, Lupus anticoagulant .
49. Labs UPON red flags
49
Dysmyelinating/ Metabolic Disorders:
• Lumbar puncture
• EMG/NCVs
• biochemical studies
• buccal or rectal mucosa biopsy for electron microscopy if neuronal
ceroid lipofuscinosis (NCL) suspected
• Brain biopsy (rarely needed): fingerprint profiles, curvilinear and
rectilinear bodies by E.M. in NCL oligodendrocytes; diffuse white
matter gliosis by light microscopy in NCL.
50. Labs UPON red flags
50
Urine/blood for biochemical studies, including levels of:
• WBC arylsulfatase A, Very long chain fatty, Fasting arterial lactate,
Quantitative plasma amino acid and Urine organic acid analyses.
Nutritional deficiency/Toxicity:
• Vitamin B12, Copper and Zinc Levels, Ceruloplasmin, Folate, Heavy
metal screen.
52. 52
“The most common reason for falsely
attributing a patient’s symptoms to
multiple sclerosis is faulty
interpretation of the magnetic
resonance imaging.”
Famous Dictum
Loren A. Rolak
2007
55. MRI Red Flags (Major)
55
Calcifications on CT
scans
28 Cysticercosis; toxoplasmosis, mitochondrial disorders
Selective involvement of
the anterior temporal and
inferior frontal lobe
27 CADASIL
Lacunar infarcts 27
Hypertensive ischemic disease; CADASIL; Susac
syndrome
Persistent Gd-
enhancement and
continued enlargement of
lesions
27 Lymphoma; glioma; vasculitis; sarcoidosis
56. MRI Red Flags (Major)
56
Simultaneous
enhancement of all lesions
26 Vasculitis; lymphoma; sarcoidosis
T2-hyperintensity in the
dentate nuclei
26 Cerebrotendinous xanthomatosis
T1-hyperintensity of the
pulvinar
25 Fabry disease; hepatic encephalopathy; manganese toxicity
Large and infiltrating
brainstem lesions
24 Behçet's disease; pontine glioma
Predominance of lesions
at the cortical/subcortical
junction
23
Embolic infarction; vasculitis; progressive multifocal
leukoencephalopathy
57. MRI Red Flags (Intermediate)
57
Hydrocephalus 23
Sarcoidosis or other chronic meningitis;
lymphoma or other CNS neoplasm
Punctiform parenchymal enhancement 23 Sarcoidosis; vasculitis
T2-hyperintensities of U-fibers at the vertex,
external capsule and insular regions
22 CADASIL
Regional atrophy of the brainstem 21
Behçet's disease; adult onset Alexander's
disease
Diffuse lactate increase on brain MRS 21 Mitochondrial disease
Marked hippocampal and amygdala atrophy 21 Hyperhomocystinemia
Symmetrically distributed lesions 20 Leukodystrophy
T2-hyperintensities of the basal ganglia,
thalamus and hypothalamus
20
Behçet's disease; mitochondrial
encephalomyopathies; Susac's
syndrome; acute disseminated
encephalomyelitis
58. MRI Red Flags (Intermediate)
58
Diffuse abnormalities in the
posterior columns of the cord
20
B12 deficiency; copper deficiency;
paraneoplastic disorder
Lesions across GM/WM
boundaries
19
Hypoxic-ischemic conditions;
vasculitis; systemic lupus erythematosus
T2-hyperintensities of the
temporal pole
19 CADASIL
Complete ring enhancement 18 Brain abscess; glioblastoma; metastatic cancer
Central brainstem lesions 17
Central pontine myelinolysis; hypoxicischemic
conditions; infarct
59. MRI Red Flags (Intermediate)
59
Predominant brainstem and
cerebellar lesions
1 7 Behçet's disease; pontine glioma
Lesions in the center of CC,
sparing the periphery
1 7 Susac's syndrome
Dilation of the Virchow-Robin
spaces
15
Hyperhomocystinemia;
primary CNS angiitis
Cortical/subcortical lesions
crossing vascular territories
14
Ischemic leukoencephalopathy; CADASIL;
vasculitis
60. MRI Red Flags (Intermediate)
60
Large lesions with absent or rare
mass effect and enhancement
1 3 Progressive multifocal leukoencephalopathy
No “occult” changes in the NAWM 1 3 Lyme disease, isolated myelitis, CADASIL
No enhancement 8
Progressive multifocal leukoencephalopathy; ischemic
lesions; metachromatic leukodystrophy
No optic nerve lesions 9
Metastatic carcinoma; gliomatosis cerebri;
toxoplasmosis
No spinal cord lesions 10
Multiple infarcts; vasculitis; progressive multifocal
leukoencephalopathy
Large lesions 11
Glioblastoma; lymphoma; progressive multifocal
leukoencephalopathy
No T1 hypointense lesions (black
holes)
11
Ischemic degenerative leukoencephalopathy;
progressive multifocal leukoencephalopathy
Marked asymmetry of WM lesions 12 Glioblastoma; lymphoma; cerebral infarction
64. 64
Normal Aging
• Periventricular caps
and bands
• Mild atrophy with
widening of sulci and
ventricles
• Punctate and
sometimes even
confluent lesions in the
deep white matter
(Fazekas I and II).
66. These white matter changes are classified
according to Fazekas:
66
• Mild - punctate WMLs: Fazekas I)
• Moderate - confluent WMLs: Fazekas II - in the deep white
matter can be considered normal in aging.
• Severe - extensive confluent WMLs: Fazekas III - always
abnormal.
83. 83
MRI Red Flags
Poorly defined lesion border/ U fiber involvement
Progressive Multifocal Leukoencephalopathy
84. 84
Tumefactive MS
• Post-gadolinium, there may
be some peripheral
enhancement, often with an
incomplete ring.
• These lesions can be
distinguished from gliomas or
intraparenchymal abscesses,
which typically have a
closed-ring enhancement.
96. D.D. OF M.S. IN MRI
96
1. Age-related changes
2. Acute disseminated encephalomyelitis
3. CNS vasculitis
4. Behçet disease
5. Sjögren syndrome
6. Sarcoidosis
7. Metastatic neoplasm
8. CADASIL (cerebral autosomal dominant arteriopathy with
subcortical infarcts and leukoencephalopathy)
9. Binswanger disease
10. Migrainous ischemia
97. D.D. OF M.S. IN MRI
97
11. Cerebrovascular disease
12. Progressive multifocal leukoencephalopathy
13. Inherited white matter diseases
14. Effects of radiation therapy or drugs
15. CNS lymphoma
16. Lyme disease
17. HTLV-1 infection
18. CNS lupus
19. Mitochondrial encephalopathies
20. Antiphospholipid antibody syndrome
98. Mental map for diagnosis of MS
98
Clinical/Paraclinical/Imaging
Typical for MS
Fulfills Criteria
Atypical for MS
Red Flags Present
Work Up for Alternative
Diagnoses
Clinical/Imaging Follow
Up
Alternative Diagnosis
Established
Further clinical/imaging
typical for MS
MS Diagnosis
Typical for MS
not Fulfilling Criteria
Clinical/Imaging Follow
Up