Imaging SBA Module 6 Flashcards
Atypical rhabdoid vs medulloblastoma
Both involve cerebellar hemisphere, but atypical rhabdoid can involve CPA
Carotid body tumours MRI
High T2 signal
Causes of high T1 in basal ganglia
Calcification,
Haemorrhage, Wilsons, long term TPN,
Hamartomas in NF1,
Chronic liver disease
Temporal lobe lesions - vision effect
Contralateral superior quadrantanopia
Trichilemmal cysts
slow growing superficial scalp nodules with internal calcifications and no enhancement
ADPKD
Renal impairment, HTN, associated with berry aneurysms
Chairi II - foramen magnum
Enlarged foramen magnum is typical
Carbon monoxide poisoning
High T2 in basal ganglia and globus pallidus with diffusion restriction
VHL associations
Pancreatic cysts
Cerebellar, spinal & retinal haemangioblastoma,
Renal cysts and RCC
Acute Disseminated encephalomyelitis
Recent viral illness.
Bilateral white matter changes on MRI
Choanal atresia Ix
CT nasal sinuses
MRS - tumour marker
Choline
Sturge weber associations
Cortical angiomas, rather than diffuse visceral angiomas
AVM - predictors of haemorrhage
Previous haemorrhage,
Posterior fossa location,
Venous ectasia,
Intranidal aneurysms
Dysgenesis of corpus callosum - associations
Trisomy 18 and 13,
Foetal alcohol syndrome, Gorlin syndrome
Intracranial lipoma,
Dandy walker,
Chairi II,
Holoprosencephaly,
Porencephaly,
Hydrocephalus,
Grey matter heterotopias
TS features
Facial angiofibromas
Cortical tubers
Subependymal nodules
Hypomelanotic macules
Widened cranial sutures - width
> 10mm at birth
3mm at 2 years
2mm at 3 years
Causes of orbital hyperostosis
Fibrous dysplasia
Pagets
Meningioma
Radiotherapy (NOT chemo)
Dentigerous cysts
Benign odontogenic cysts adjacent to crown of unerupted tooth.
Most are painless and incidental.
Well defined, thin sclerotic margin, expanding overlying cortex without breech.
Floating tooth causes
Severe peridontal disease,
LCH,
Hyperparathyrois
Mets
Multiple myeloma
