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Epilepsy boards > epilepsy syndromes > Flashcards

epilepsy syndromes Flashcards

1
Q

Age of onset (range + peak)
Childhood Absence Epilepsy (CAE)
Juvenile Absence Epilepsy (JAE)
Epilepsy with Myoclonic Absences (EMA)

A

CAE: 4-8 years (peak 6)
JAE: 8-20 years (peak 9-13)
EMA: 1-12 years (peak 7)

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2
Q

Epilepsy with Myoclonic-Atonic seizures (EMAS)
Specific EEG finding

A

4-7 Hz rhythmic theta activity over central regions and vertex

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3
Q

Epilepsy with Myoclonic-Atonic seizures:
AKA:
Age of onset
First seizure type often seen
% of patient’s with family history
Two common mutations

A

AKA: Doose
Age of onset: 1-5 years
First seizure type often seen: GTC (75-95%)
% of patient’s with family history of epilepsy: 15-32%
Two “common” mutations: SCN1A and Glut-1

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4
Q

Triad required to diagnose Lennox-Gastaut Syndrome
Category 1:
Category 2:
Category 3

A
  1. Multiple seizure types
  2. EEG features
    - Slow background
    - Generalized 1.5-2 Hz discharges
    - Multifocal discharges
    - Generalized fast activity (10-25 Hz)
    3: Cognitive dysfunction
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5
Q

Lennox-Gastaut Syndrome
Age of onset:
% preceded by spasms:
% with no clear cause
% with family history of epilepsy

A

Age of onset: 3-5 years
% preceded by spasms: 10-25%
% with no clear cause (22-30%)
% with family history of epilepsy: 3-30%

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6
Q

ways to clinically differentiate seizures in JAE compared to CAE (3)

A
  1. seizures less frequent with JAE (1- a few per day)
  2. JAE more frequently associated with GTC (80%)
  3. Impairment of consciousness less severe with JAE
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7
Q

Seizures in JME:
Age of onset:
Myoclonic %:
GTC %:
Absence %:

A

Age of onset: 12-18 years (peak 14.6)
Myoclonic: 100% (required for diagnosis)
GTC: 80-95% - often preceded by cluster of myoclonic jerks
Absence: 18-38%

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8
Q

More JME %s
% of patients with family history of epilepsy
% with photosensitivity

A

40-50% have family history
30% have photosensitivity

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9
Q

Autosomal Dominant Nocturnal Frontal Lobe Epilepsy (ADNFLE)
Associated Genes:
Age of onset

A

Neuronal nicotinic acetylcholilne receptor subunits (CHRNA4, CHRNB2, CHRNA2)
11.7 years

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10
Q

Autosomal Dominant Partial Epilepsy with Auditory Features (ADPEAF):
- Course
- Commonly associated gene

A

Course: Benign
Gene: leucine-rich glioma inactivated 1 (LGI-1) gene

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11
Q

Familial Focal Epilepsy with Viariable Foci
Most commonly affected lobe
Inheritance:
Penetrance:
Chromosome location

A

Most commonly affected lobe: Frontal
Inheritance: Autosomal dominant
Penetrance: 70%
Chromosome; 22q12

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12
Q

Patient with Gelastic Seizures: What GENETIC condition can be associated with the commonly found imaging finding

A

GLI3 mutation : pallister-hall syndrome

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13
Q

Seizure types seen with Hypothalamic Hamartoma:
Most common
Others (3)

A

Most common: gelastic (laughing)
Others
- Dacrystic (crying)
- tonic
- atonic

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14
Q

Patient posturing, apnea / cyanosis, autonomic signs and clonic motion. EEG normal. What mutations on which chromosomes could this patient have

A

Benigh Familial Neonatal Seizures (BFNS, or “3rd day fits”)
KCNQ2 - Chromosome 20
KCNQ3 - Chromosome 8

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15
Q

Otahara Syndrome
Onset
Most common etiology
Other associated genes (4)

A

Onset - first 3 months
Most common etiology: structural brain lesions
Other genes
- STXBP1
- CDKL5
- ARX
- KCNQ2

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16
Q

EEG feature distinguishing Ohtarahara syndrome (EIEE) with Early Myoclonic Encephalopathy

A

EME has burst suppression pattern is more distinct during sleep (Ohtahara = in all states)

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17
Q

Age of onset - Migrating partial seizures of infancy

A

1 week - 7 months (mean 3 months)

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18
Q

Dyslexia trip-up
Differentiate EME with MEI
- Onset
- Seizure types
- EEG
- Prognosis

A

Early Myoclonic Encephalopathy (EME)
- Onset first month of life
- Seizures
- myoclonus of limbs + face
- Spasms
- Focal seizures
- EEG: Suppression burst pattern + periodic activity
- Prognosis: very bad
Myoclonic Epilepsy of Infancy (MEI)
- Onset: 4 mo-3 years
- Seizures
- axial or upper extremity myoclonic jerks + head drop
- (subcategory) reflex epilepsies
- EEG: diffuse spike/polyspikes lasting 1-3 seconds
- Prognosis: good (typically outgrow)

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19
Q

Benign infantile seizures
Onset (2)
Males:Females (2)
Genetics (2)

A

Onset
- Familial: 4/7 months
- non-familial: 3-20 months (up to 2 years)
Male:Female ratio
- Familial: female
- Non-familial: no preference
Genetics (familial form)
- PRRT (same as paroxysmal kinesigenic dyskinesia)
- ASC-1
- SCN2A

20
Q

Myoclonic Encephalopathy in Non-progressive disorders
List 3 subtypes

A

Absence + myoclonic seizures
Alternating bilateral positive and negative myoclonus
Mild onset with focal facial (then limbs) seizures

21
Q

Absence +Myoclonic seizures
- Subtype of _____
- Onset
- EEG
- Associated conditions (name 3)
- Treatment

A
  • Subtype of Myoclonic Encephalopathy in Nonprogressive disorders
  • Onset: 1st year
  • EEG: Theta/delta or delta+Spikes
  • Associated conditions (there are others)
    • Angelman
    • Prader-Willi
    • Rett
  • Treatment: ESM + VPA
22
Q

Alternating Bilateral positive and negative myoclonus:
- subtype of _____
- Onset
- EEG (3 potential)
- Other potential clinical feature
- Associated condition
- Prognosis

A
  • Subtype of Myoclonic Encephalopathy in Non-Progressive d/o
  • Onset: at or before 6 years
  • EEG:
    • Rhythmic slow spike-waves
    • multifocal spike-waves
    • theta-delta
  • Other clinical feature: may also have dyskinetic movements
  • Associated condition
    • Structural brain malformations
  • Prognosis: non-progressive, but very stunted development
23
Q

Mild onset with focal facial seizures
- Subtype of
- Onset:
- EEG (2)
- Associated conditions
- other symptom
- Prognosis

A
  • Subtype of Myoclonic Encephalopathy in Non-Progressive d/o
  • Onset: 7mo-5 years
  • EEG
    • Generalized spike-waves
    • Bilateral continuous slow activity
  • Associated conditions; neonatal anoxia (potentially)
  • Other potential feature: myoclonus
  • Prognosis
    • Clinical deterioration (both pyramidal and extrapyramidal signs
24
Q

Febrile Seizures - Epidemiology
- % of people in US who will have a febrile seizure
- Approx age range
- Median age
- % of patients with siblings w/ FS

A
  • % of people in US who will have a febrile seizure: 3-5%
  • Age range: Half of patients have onset between 12 and 30 months
  • Median age: 18 months
  • % of patients with siblings w/ FS
25
Q

Febrile seizures - Epidemiology
- % who will have second Febrile Sz
- If second, % you will have third
- % that will recur in first 6 month
- % that will recur in first year

A
  • % who will have second: 33%
  • If second, % you will have third: 50%
  • % that will recur in first 6 month: 50%
  • % that will recur in first year: 75-90%
26
Q

Febrile seizures:
Factors that affect recurrence (3)

A
  • Age : risk doubles if <1 year
  • 1st degree relative with FS (roughly doubles)
  • low grade fever at time of onset
27
Q

Febrile seizures, factors that increase risk of developing epilepsy

A
  • Positive family history of epilepsy
  • abnormal neurodevelopment
  • occurrence of complex febrile seizure
    postictal todd’s paralysis
  • increased number of febrile seizures
  • longer duration of seizure
28
Q

Dravet syndrome:
Typical course

A
  • Febrile seizure in 1st year
  • Seizure free period followed by myoclonic seizures at 1-4 years
  • Normal early development, then deterioration
29
Q

SeLECTS:
Onset - range
Onset - peak range

A

Onset range: 2-14 years
Peak range: 7-10 years

30
Q

SeLECTS:
- Less common initial semiology
- % that only have symptoms while awake

A
  • sensory sensations in tongue, lips, gums, or cheek
  • 10-20%
31
Q

SeLECTS:
Age by which point seizures are outgrown
Why it is “recommended” not to treat

A
  • 16
  • Nearly 80% have <6 seizures
32
Q

Panayiotopolous Syndrome
- AKA
- Onset

A
  • AKA: Early Childhood Onset “occipital” epilepsy
  • Onset 3-6 years
33
Q

Panayiotopolous Syndrome
- Semiology

A
  • Initial: Behavioral agitation > headache
    > autonomic symptoms
    • Vomiting
    • Pallor
    • Cyanosis
      >may progress to hemiclonic / GTC
34
Q

Panayiotopolous Syndrome
-% who will have > 5 seizures in lifetime
- % with seizures out of sleep

A

15%
67% (2/3)

35
Q

Gastaut Syndrome (late Childhood onset “occipital” Epilepsy
- Onset
- Semiology (3)
- Prognosis

A
  • Onset: 8-11 years
  • Initial semiology
    • Elementary visual auras
      +/- > partial vision loss
      +/- > progress to focal motor
  • Tend to remit 2-7 years after onset
36
Q

Differences between Gastaut syndrome and Panayiotopolous Syndrome
- Age of onset
- Semiology
- Duration
- Timing

A

Age of Onset
- PS: 3-6
- GS: 8-11
Semiology
- PS: autonomic > hemiclonic/GTC
- GS: elementary visual aura > very rarely GTC
Duration:
- PS: can be prolonged (SE)
- GS: frequent but short
Timing
- PS: 2/3 at night
- GS: typically daytime

37
Q

Rasmussen Syndrome
- Onset:
- Antecedent conditions and what it means

A

Onset: 3-14 years
- May be preceded by nonspecific illness or in patients with autoimmune conditions
- Believed to have autoimmune cause

38
Q

Rasmussen Syndrome: Treatment
Category 1
Category 2
Category 3

A

Category 1: traditional ASM
Category 2: Immunomodulators
- Steroids
- IVIG
- Chemotherapy (i.e. cyclophosphamide)
Category 3: surgery (hemispherectomy)

39
Q

Rasmussen Syndrome: factors affecting prognosis post surgery

A

Preoperative level of function

40
Q

Patient presents with history of seizures involving acoustic hallucinations
Name possible gene and two names for this disorder

A

Gene: LGI1
Disorder: Autosomal dominant lateral temporal lobe epilepsy (ADLTLE)
OR
Autosomal Dominant partial epilepsy with Auditory Features (ADPEAF)

41
Q

What condition does this patient have?

A

Tuberous sclerosis (left parieto-occipital and right frontal FLAIR lesions + linear streak of white matter hyperintensity

42
Q

“Nevus flameous” is assocaited with what condition?

A

facial capilary angioma (sturge weber)

43
Q

Angelman Syndrome:
- Chromosome
- physical / clinical features (5)
- Likelihood of seizures:
- Typical age of seizure onset
- Seizure types (4)

A

Chromosome: 15
Clinical features
- Severe developmental delay
- Prominent jaw
- microcephaly
- Jerky limb movements
- Inappropriate “happy” demeanor
Rate of Epilepsy: 85%
Age of seizure onset: first 3 years
Most frequent seizure types:
- Atypical absences
- GTC
- Atonic
-Myoclonic

44
Q

Angelman syndrome:
Chromosome location
Types of inheritance (4)

A

Chromosome: 15q11.2-q13
Types of inheritance:
- 70% de novo maternal deletions
- 2% paternal uniparental disomy
- 3% imprinting defect
- Subset of remaining 25%: UBE3A mutation

45
Q

Risk factors for severe cognitive impairment in LGS
- Big one
- Three others

A
  • Big one; non-convulsive status epilepticus
    Three others
  • Previous diagnosis of West syndrome
  • symptomatic etiology
  • early age of onset of epilepsy
46
Q
A

Epilepsy boards (23 decks)

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