General Neurology Flashcards
3 most common causes of ataxia?
Acute cerebellar ataxia
Drug intoxication
Guillain-Barre Syndrome
2yo child presents with sudden inability to sit/walk with wide based gait. Coordination impaired. Viral illness 2/53 ago. Cause of ataxia?
Acute cerebellar ataxia
Treatment of acute cerebellar ataxia?
Supportive, usually improved within 2-3 weeks however can last up to 3 months
Can sometimes give steroids/IVIG
Most common degenerative ataxia?
Ataxia Telangiectasia
18mo child now walking with narrow based gait, nystagmus and apraxia of horizontal gaze. Recurrent sinopulmonary infections. Telangiectasias in conjunctivae and on bridge of nose. High AFP. What dx?
Ataxia Telangiectasia
Immune deficiency seen in Ataxia Telangiectasia?
Decreased secretory IgA
Diminished IgG2, Ig4 and IgE
What malignancy seen in ataxia telangiectasia and what RF to avoid?
Lymphoreticular tumours, brain tumours
Highly radiation sensitive (avoid unnecessary imaging)
Most common hereditary ataxia?
Friedrich’s Ataxia
Gene mutation and inheritance of Friederich’s Ataxia?
AR
Trinucleotide repeat expansion GAA causing mutation in mitochondrial frataxin protein
11yo child presents with ataxia, loss of lower limb reflexes and diminished sense of vibration in lower limbs. Dysarthric speech. Might have skeletal abnormalities or hypertrophic cardiomyopathy. What dx?
Friederich’s Ataxia
Management of Frederich’s Ataxia?
Antioxidant therapy - coenzyme Q10
Vitamin E
7yo boy presenting with fever, encephalopathy, ataxia, language disturbance. Recent ED presentation with enterovirus.
MRI shows hyper-intense white matter abnormalities - mostly subcortical
CSF - increased protein
What dx?
Acute Disseminated Encephalomyelitis (ADEM)
Management of ADEM?
?no management
Steroids - IV methylpred then a PO pred slow wean
IVIG if not responsive to steroids
Plasmapheresis if not responsive to either
Can consider rituximab, cyclophosphamide
Risk of MS after ADEM?
2-10%
60-90% of children make full recovery without sequelae
Child presents with bilateral leg weakness, hyperreflexia and clonus, urinary retention.
MRI shows demyelinating lesions of spinal cord with cord swelling and enhancement. Dx?
Transverse myelitis
Treatment of transverse myelitis?
IV steroids with a slow PO steroid wean
IDC if urinary retention
Plasma exchange if not responsive to steroids
Child presents with vision worsening over the last day or so, on testing has central scotoma and failed Ishihara tests with red numbers. Eye pain with eye movement. Had a viral illness 1/52 ago. Dx?
Optic neuritis