Inflammatory Disorders of the CNS Flashcards
How do young people present with MS?
Relapsing-Remitting (RRMS)
How do older patients present with MS?
Primary Progressive (PPMS)
What is Secondary Progressive MS?
RRMS that converts to PPMS
What is clinically isolated syndrome?
“first attack”, ?What amount of risk of 2nd attack?
What is Radiologically Isolated Syndrome (RIS)?
individuals scanned for “non”-MS symptoms, yet have apparent MS on MRI scans, ?What amount of risk of any clinical attack?
Who is most affected by MS?
Women age 15-45. Incidence greater further from the equator. Most common inflammatory CNS disorder
What is the pathology of MS?
Lesions Evolve Over Time
Early Perivascular lymphocytic infiltrate, with T/B cells, MΦ, complement, IgG, and complement; demyelination with relative axonal sparing
Later more of a glial scar, modest inflammation
Lymph node-like structures with B cells seen in meninges, especially in progressive MS
What is seen on MRI in MS?
Gray matter lesions,seen early pathologically
How many MS immunopathological subtypes are there in white matter?
four. All type IV are PPMS
Types I/II c/w encephalomyelitis
Types III/IV c/w oligodendrocyte dystrophy
What damage is done to the neurons by MS?
Axonal transection
What genes are associated with increased risk of MS?
Risk linked to HLA DR2; Link to IL-7 receptor, IL-2 receptor mutations; now >100 genes linked, most at odds ratios of about 1.1
What environmental components are linked to MS?
EBV, cigarettes, Vitamin D deficiency, Obesity
How is diagnosis of MS made?
New way:
Primarily diagnosed clinically, but MRI/CSF help define dissemination in time/space
Allow Dx after a single attack and single scan IF certain MRI features seen
Old way:
Multiple CNS Lesions
Disseminated in SPACE in CNS
Disseminated in TIME
RRMS – 2 or more clinical attacks 30+ days apart
PPMS - Minumum 12 months of progression of Sx, with disseminated lesions in space
Objective abnormalities on neurological exam
NO OTHER CAUSE IDENTIFIED
What are the early symptoms of MS?
Onset most often is unifocal at first, eg, one eye, single cord lesion clinically
Numbness/tingling, Loss of Vision (optic neuritis), Gait/balance Problems, Weakness, Diplopia (double vision), Lhermitte’s (tingling down spine when flex neck), Vertigo
What are the later symptoms of MS?
multifocal, and more general Sx
early symptoms, plus Fatigue, Sexual and Cognitive Dysfunction, Urinary Urgency and Frequency, Constipation, Depression, Spasticity, Dysphagia, Secondary Problems (eg, skin breakdown, infections, problems of immobility)