Multiple Sclerosis- epidemiology Flashcards
Does MS affect women or men more
women
Do adolescence get MS
it is uncommon
At what age is the most common onset of MS
between 20 and 40 years old
Can people in their 60s get MS
uncommon after 60, but the disease can be very mild until 60, then require medical intervention
Geographical Pattern of Prevalence - which countries are at more risk and least at risk
High risk areas
Northern US, Northern Europe, Southern Canada, New Zealand, Southern Australia
Medium risk areas
Southern US and Europe, Northern Australia
Low risk
Africa, Asia
Migration patterns & epidemiological studies have revealed that where a person spends the 1st 15 years of life determines the likelihood of developing MS
If you were born in the north and move to the south at 17, higher risk
If you were born in the south and move north at 17, lower risk
If you were born in the north and move south at 10, lower risk
If you were born in the south and move north at 10, higher risk
What do geographical patterns of MS tell us?
Indicates an environmental trigger (e.g. virus)
Exposure to Viral Agent
Molecular Mimicry
Immune system responds to viral agent with activated myelin-reactive lymphocytes
Implicated Viruses, yet to be proven Epstein-Barr Measles Canine Distemper Human Herpes Virus-6 Chlamydia pneumonia
Genetics and MS
Risk of developing MS is greater if you have a sibling with MS, greater risk for ♀ sibling vs. ♂ sibling
3% for sibling
5% for fraternal co-twin
25% for identical co-twin
Risk is 1 in 750 for getting MS in the general population, but 1 in 40 for someone with a family history of MS
Favorable prognostic indicators:
Female, onset before age 35, monoregional vs polyregional attacks, and complete recovery after attacks
Unfavorable prognostic indicators: For MS
Male, brainstem symptoms (ataxia, nystagmus, tremor, dysarthria), poor recovery after exacerbations, & high frequency of attacks
What is monoregional vs polyregional attacks?
monoregional vs polyregional - one area of attack as suppose to multiple area of attack
What should someone do if they are getting an MS exasperation
Go to the hospital right away and get steroids so you can reduce damage
What are the 4 types of MS
Relapsing-Remitting (RR)
Primary-Progressive (PP)
Secondary-Progressive (SP)
Progressive-Relapsing (PR)
What is Myelocortical MS (MCMS)*
Is a new sub-type of MS identified in 2018.
It is marked by demyelination of the spinal cord and cerebral cortex but not of cerebral white matter.
Neuronal loss with no demyelination of the white matter
Neurons become swollen and look like typical MS lesions indicative of white matter myelin loss on MRI
Indistinguishable from traditional MS on MRI