Radiology Live Unit 6

Question 1

Adenomatoid odontogenic tumour vs ameloblastoma

Answer 1

AOTs contain calcifications often, vs never

Question 2

Most specific feature for NPH

Answer 2

Callosal angle <90 degrees

Question 3

X-linked adrenoleukodystrophy distribution

Answer 3

Posterior predominant changes with enhancement

Question 4

Carotid artery: focal stenosis with adjacent outpuching

Answer 4

Suggests atheromatous plaque rather than dissection

Question 5

Common causes of skull mets

Answer 5

Breast, lung, prostate, renal

Question 6

Multiple periventricular and juxtacortical white matter lesions

Answer 6

MS

Question 7

Cholesteatoma can cause

Answer 7

tinnitus

Question 8

Most useful MR perfusion paramater for haemodynamic status of Moyamoys

Answer 8

MTT - Mean Transit Time

Question 9

Best MR sequence for early CVST

Answer 9

T1 fat sat post contrast

Question 10

Extensive SAH from ruptured basilar tip aneurysm on non-con CT

Answer 10

CT Angio

Question 11

Most useful MR sequence to assess intramedullary cord lesions

Answer 11

Sagittal T1

Question 12

Follow up for small (<2.5cm) incidental falx meningiomas

Answer 12

Annual MRI 2-3 years

Question 13

Progressive unilateral cerebral atrophy

Answer 13

Rasmussen’s encephalitis

Question 14

Most commonly affected part of corpus callosum in ALS

Answer 14

Body

Question 15

Odontogenic keratocyst vs dentigerous cyst

Answer 15

Dentigerous cysts cause significant buccolingual expansion of the jaw

Question 16

Kearns-Sayre syndrome

Answer 16

Cerebral and cerebellar atrophy with white matter changes, particularly subcortical

Question 17

Pituitary gland engorgement

Answer 17

Intracranial hypotension

Question 18

Pineal cyst MRI

Answer 18

Thin T1 hyperintense rim with isointense centre

Question 19

TMJ dislocation direction

Answer 19

Anteriorly most common

Question 20

Motor band sign caused by

Answer 20

Axonal degeneration

Question 21

Most sensitive sequence for early changes in Rasmussen encephalitis

Answer 21

FLAIR

Question 22

Cystic posterior fossa lesion communicating with 4th ventricle

Answer 22

Blake pouch cyst

Question 23

Canavans disease

Answer 23

Diffuse white matter involvement including cerebral and cerebellar

Question 24

Tracts disrupted in Brown Sequard syndrome

Answer 24

Dorsal column

Question 25

?Craniopharyngioma on MRI, next step

Answer 25

CTB

Question 26

Commonest age for choroid plexus carcinoma

Answer 26

1 month to 2 years

Question 27

Most specific sign for radioosteonecrosis of the mandible

Answer 27

Ill defined zone of transition

Question 28

Best MR sequence to distinguish NPH and vascular dementia

Answer 28

Diffusion Tensor Imaging

Question 29

Most useful MR sequence for spinal ligamentous injury

Answer 29

STIR

Question 30

?brain mets, best Ix

Answer 30

PET CT whole body