Get Through Unit 6

Question 1

Opsoclonus-myoclonus syndrome - MRI brain

Answer 1

In kids, usually normal.
Adults, usually due to metastatic Ca

Question 2

Poor prognosis sign with acute disseminated encephalomyelitis

Answer 2

Areas of petechial haemorrhage

Question 3

GBM on DWI/ADC

Answer 3

Unrestricted diffusion, high on ADC low on DWI

Question 4

Level IV Lymph nodes drain

Answer 4

Hypopharynx, Subglottic larynx, thyroid and upper oesephagus

Question 5

Pituitary microadenoma on MRI (enhancement)

Answer 5

Focus of hypointensity with normal enhancing gland

Question 6

Expansion of the cortex suggests

Answer 6

Intraaxial lesion

Question 7

Commonest intracranial aneurysm location

Answer 7

Junction between ACA and ACOM

Question 8

Commonest cause of calcified, enhancing cervical lymph nodes

Answer 8

TB

Question 9

Fe accumulation in which part of brain may indicate onset of dementia

Answer 9

Putamen

Question 10

PML vs HIV encephalitis

Answer 10

Involvement of subcortical U fibres

Question 11

Intracranial angiogram findings in GPA

Answer 11

Multiple aneurysms with stenoses and occlusions

Question 12

Neck levels

Answer 12

Level II, III and IV lie anterior to SCM
Level II from base of skull to hyoid
Level III from hyoid to cricoid
Level IV from cricoid to clavicle
Level V posterior to SCM

Question 13

Spondylosis causes canal AP diameter to

Answer 13

Increase

Question 14

Transverse vs longitudinal temporal bone fractures

Answer 14

Transverse causes sensorineural hearing loss
Longitudinal causes conductive hearing loss

Question 15

Parathyroid adenoma with NM

Answer 15

No uptake with pertechnate.
Increased uptake with delayed washout on Sestamibi

Question 16

Severely hypoplastic verebellar vermis

Answer 16

Dandy walker malformation

Question 17

Basal vein of Rosenthal

Answer 17

Forms in sylvian fissure, travels in ambient cistern around the midbrain and enters vein of Galen

Question 18

ICA stenosis of >70% corresponds to

Answer 18

Peak velocity of >250cm/s

Question 19

Optic radiation course

Answer 19

Splits in 2, upper part of visual field runs through temporal lobe, the other runs posterior (direct) to the occipital visual cortex

Question 20

Dural venous sinuses are between which layers

Answer 20

Between both dura layers

Question 21

Nasolacrimal duct opens into

Answer 21

The inferior meatus, below the inferior nasal turbinate

Question 22

Regional blood flow tracers include

Answer 22

99mTc ECD and 99mTC-HMPAO

Question 23

Oculomotor nuclei located in

Answer 23

Superior midbrain

Question 24

Parapharyngeal space contains

Answer 24

Branches of mandubilar trigeminal nerve,
Maxillary artery,
Ascending pharyngeal artery
Pharyngeal venous plexus

Question 25

Commonest type of jaw cyst

Answer 25

Radicular cyst