Neurology - Level 3 Flashcards
Classes of brain tumours?
o High-grade – grows rapidly and is aggressive
o Low-grade – grows slowly but which may/may not be successfully treated
Epidemiology of brain tumours?
- 2% of all tumours
- Lifetime risk is 1 in 77
- Common 50-70
Risk factors of brain tumours?
o Ionising radiation o Vinyl chloride o Immunosuppression o Oil refining, embalming, textiles o Neurofibromatosis, VHL disease, TSC, Li-Fraumeni syndrome, Cowden’s disease
Types of brain tumours - malignant?
o Metastases most commonly from other sites 10x
Lung, breast, stomach, prostate, thyroid, colorectal, melanoma, kidney
Types of brain tumours - high grade?
Gliomas, glioblastoma multiforme
Primary cerebral lymphomas
Medulloblastoma
Types of brain tumours - low grade?
Meningioma Acoustic neuroma Neurofibromas Pituitary tumours Pineal tumours Craniopharyngioma
Symptoms of brain tumours?
o Headache Worst in mornings, coughing o Nausea and vomiting o Seizures o Progressive focal neurological deficits Diplopia, visual field defect, upper/lower limbs o Behavioural changes o Papilledema
Symptoms related to location of mass of brain tumours - temporal?
dysphasia, contralateral homonymous hemianopia, amnesia, odd phenomenon
Symptoms related to location of mass of brain tumours - frontal?
hemiparesis, personality change (indecent, indolent, facetious), Broca’s dysphasia, unilateral anosmia, concrete thinking, perseveration, executive dysfunction
Symptoms related to location of mass of brain tumours - parietal?
hemisensory loss, sensory inattention, dysphasia
Symptoms related to location of mass of brain tumours - occipital?
contralateral visual field defects, seeing multiple images
Symptoms related to location of mass of brain tumours - cerebellum?
DASHING (dysdiadochokinesia, ataxia, slurred speech, hypotonia, intention tremor, nystagmus, gait abnormalities)
Investigations in brain tumours?
• Urgent direct access MRI scan of brain (CT if MRI CI)
Progressive, sub-acute loss of central neurological function
• Urgent referral appointment for children within 48 hours
• Others: Technetium brain scan, Magnetic resonance angiography, PET
- Stereotactic biopsy via skull burr-hole
Investigations in gliomas?
MRI
MDT team
MR perfusion/spectroscopy
Molecular markers (IDH1&2, ATRX, 1p/19q, H3.3K27M, BRAF, MGMT, TERT)
Management of glioma - low grade?
- 5-ALA-guided resection (within 6 months)
• If not appropriate: Biopsy to attain histology and molecular diagnosis - If very low grade – active monitoring – then resection if progressing
- Post-surgical Radiotherapy followed by 6 cycles of PCV chemotherapy
• If 1p/19q, IDH-low grade glioma and >40 or residual tumour
Management of glioma - Grade 3?
5-ALA-guided resection (within 6 months)
- Post-surgical radiotherapy followed by PCV chemotherapy
• If newly diagnosed grade 3 glioma with 1p/19q codeletion
Management of glioma - Grade 4?
- Radiotherapy with temozolomide chemotherapy
• If newly diagnosed glioma
Management of glioma - Recurrent grade 3 or 4?
- PCV or lomustine chemotherapy
Investigations in meningioma?
MRI (CT if assessing bones)
Management of meningioma?
5-ALA-guided resection (within 6 months)
Radiotherapy
Investigations in brain metastases?
MRI (CT if assessing bones)
Management of brain metastases - single?
- Systemic anti-cancer therapy if likely to respond (germ cell, small-cell lung)
- Surgical excision
- Stereotactic radiosurgery or radiotherapy
Management of brain metastases - multiple?
- Adjuvant stereotactic radiosurgery/radiotherapy if 1-3 metastases
Follow up in brain tumours?
- MRI scans and clinical assessment