SBAs for the 2A Unit 6

Question 1

Homogenously enhancing mass, isointense to grey matter on T2, pineal region

Answer 1

Germinoma

Question 2

Commonest trigonal mass in adulthood

Answer 2

Meningioma

Question 3

Suprasellar lesion, enhancing, erosion of sella floor and expansion of sella

Answer 3

Pituitary adenoma

Question 4

Cyst with nodule in adult (posterior fossa)

Answer 4

Haemangioblastoma

Question 5

Echogenic parenchyma in newborn baby US brain parietal region

Answer 5

MCA infarct

Question 6

Lytic lesion in maxilla, Hx of AML or CML

Answer 6

Granulocytic sarcoma or Chloroma

Question 7

Globular lesion attached to septum pellucidum with hydrocephalus

Answer 7

Central neurocytoma

Question 8

Best sequence for posterior fossa MS lesions

Answer 8

T2

Question 9

Thyroid cancer DDx

Answer 9

Papillary - concentrates radioiodine
Follicular - concentrates pertechnate but doesn’t accumulate radioiodine
Anaplastic - no radioiodine uptake
Medullary - no radioiodine, pertechnate uptake, but concentrates thallium 201

Question 10

Enhancing heterotopic grey matter

Answer 10

Tuberous sclerosis

Question 11

Infiltrative retrobulbar mass suggestive of

Answer 11

Breast cancer mets (IDC)

Question 12

Most sensitive sequence for parathyroid adenoma

Answer 12

Axial T2 fat sat

Question 13

Spheno-occipital bony destructive lesion with soap bubble appearance

Answer 13

Chordoma

Question 14

Thyroid lesion with calcified lymph nodes

Answer 14

Medullary carcinoma

Question 15

Multilocular lucent expansile jaw lesion

Answer 15

Ameloblastoma

Question 16

Commonest vascular orbital masses in children

Answer 16

Capillary haemangioma

Question 17

AIDS, peripherally enhancing lesion crossing the corpus callosum

Answer 17

Primary CNS Lymphoma

Question 18

Absent septum pellucidum, optic nerve hypoplasia

Answer 18

Septo-optic dysplasia, associated with schizencephaly

Question 19

AVM risk of haemorrhage

Answer 19

2-3% per year, not significantly increased during pregnancy

Question 20

Gliomatosis Cerebri

Answer 20

Can extend to deep grey matter

Question 21

Mesial temporal sclerosis

Answer 21

Volume loss and increased T2 signal in hippocampus

Question 22

Large sella and hypertelorism

Answer 22

Hypothyroidism

Question 23

Leptomeningeal and cranial nerve enhancement

Answer 23

Sarcoid

Question 24

Infant/neonate: Periventricular subependymal cysts, periventricular and parenchymal calcifications

Answer 24

CMV

Question 25

ICA doppler stenosis criteria

Answer 25

Peak systolic volume vs Degree of stenosis:
<150cm/s - 0-49% stenosis
150-230cm/s - 50-69% stenosis
>230cm/s - >70% stenosis