Revise Radiology H&N

Question 1

Slow growing, sclerotic lesions attached to outer table of skull

Answer 1

Osteoma

Question 2

Commonest complication of acute mastoiditis

Answer 2

Sigmoid sinus thrombosis

Question 3

Hyperattenuating mass conforming to shape of orbit without deforming it

Answer 3

Orbital lymphoma

Question 4

Bunch of grapes overlying skull

Answer 4

Skull vault haemangioma

Question 5

Sarcoid orbital disease distribution

Answer 5

Extraconal

Question 6

Intensely enhancing tumour with calcifications near petrous bone

Answer 6

Endolymphatic sac tumour

Question 7

Cholesteatoma MRI

Answer 7

Iso T1, Iso T2, no enhancement, restricted diffusion
Pars flaccida cholesteatomas are T2 bright

Question 8

Expansile, unilocular lesion with sclerotic rim in posterior mandible

Answer 8

Odontogenic keratocyst

Question 9

Infiltrative, intermediate T1 and T2 lesion in maxilla, CML

Answer 9

Granulocytic sarcoma

Question 10

Subdural spinal bleed

Answer 10

Much rarer than epidural, inverted mercedes benz on axial imaging

Question 11

Ix to evaluate extent of disease in paillary thryroid cancer

Answer 11

I-123 whole body scan

Question 12

Glomus jugulare location

Answer 12

Hypotympanum

Question 13

Depressed blood flow and metabolism affecting the cerebellar hemisphere after a contralateral supratentorial insult

Answer 13

Crossed cerebellar diaschisis

Question 14

Dentigerous cyst underlying pathology

Answer 14

Developmental anomily during enamel formation

Question 15

Skull vault haemangioma histology

Answer 15

Hamartoma with fat, smooth muscle, fibrous tissue and endothelium

Question 16

Branchial cleft cyst types

Answer 16

Type 1: external auditory canal to angle of mandible
Type 2: Near angle of mandible, anterior and medial to SCM
Type 3: Deep to SCM or posterior
Type 4: Near larynx or thyroid

Question 17

Acquired vs congenital cholesteatoma

Answer 17

Cochlear promontory is first involved in congenital, spared in acquired

Question 18

Acoustic neuroma vs meningioma

Answer 18

Meningioma has dural tail, neuroma centered on internal audiory canl

Question 19

Pars flaccida cholesteatoma commonest eroded bone

Answer 19

Long handle of incus

Question 20

Optic nerve glioma MRI

Answer 20

Enlarged optic nerve with T1 hypo and t2 hyperintensity

Question 21

High T2 in cystic areas and enhancing mural nodule

Answer 21

Ameloblastoma

Question 22

Well circumscribed lesion surrounding an unerupted tooth

Answer 22

Dentigerous cyst

Question 23

Facial nerve injury caused by

Answer 23

Transverse fracture of temporal bone

Question 24

New cystic level 2 mass in older person

Answer 24

SCC until proven otherwise (Head and neck)

Question 25

Hard, painless thyroid mass

Answer 25

Reidel's thyroiditis

Question 26

Lateral semicircular canal erosion causes

Answer 26

Labyrinthine fistula

Question 27

Heterogenous giraffe skin appearance of thyroid on US

Answer 27

Hashimotos

Question 28

Atlas fracture classification

Answer 28

Gehweiler: Type 1: Anterior arch Type 2: Posterior arch, usually bilateral Type 3: Anterior and posterior arch (Jefferson burst fracture) - 3a: Intact transverse atlntal ligament - 3b: disrupted transverse atlantal ligament Type 4: Lateral mass Type 5: Isolated C1 transverse process fracture

Question 29

Warfarin, intraspinal haemorrhage, Rx

Answer 29

Vitamin K, then surgery

Question 30

Recurrent odontogenic keratocysts

Answer 30

Multilocular lesion with thin enhancing rim

Question 31

Hangman fracture

Answer 31

C2 pars interarticularis fracture, classified by Levine and Edwards

Question 32

Subglottic tumours likely to spread to (node level)

Answer 32

Level 3 nodes

Question 33

Flexion teardrop on CT, next step

Answer 33

Immediate surgical intervention

Question 34

Attachments of the tympanic membrane

Answer 34

Scutum (superior) and tympanic annulus (inferior)

Question 35

Dentigerous cyst Rx

Answer 35

Enucleation

Question 36

Air in cochlear or vestivule

Answer 36

Perilymphatic fistula

Question 37

Cerebral amyloid angiopathy

Answer 37

Multiple peripheral haemorrhagic foci in normotensive pt

Question 38

Metastatic papillary thyroid Ca on US and FNA

Answer 38

Surgery and then look for distant mets

Question 39

Paget Schroetter syndrome

Answer 39

Compression and thrombosis of subclavian vein as it enters the thorax, seen in young sporty ppl

Question 40

Peripheral vascularity in lymph node

Answer 40

Suggests malignant

Question 41

Normal optic nerve diameter

Answer 41

optic nerve 2mm CSF thickness 1.5mm

Question 42

Expansile skull vault lesion with sunburst pattern

Answer 42

Skull vault haemangioma

Question 43

Hypointense filling of sinuses on T1 and T2

Answer 43

Fungal sinusitis

Question 44

Corpus callosum normal myelination

Answer 44

Splenium 3-4 months, genu 6 months

Question 45

Carotid body tumours associated with

Answer 45

MEN 2a

Question 46

commonest cause of pulsatile tinnitus

Answer 46

Glomus jugulare tumour

Question 47

Tell demarcated mixed lytic and sclerotic lesions, common in jaw

Answer 47

Ossifying fibroma

Question 48

Trigeminal neuralgia underlying pathology

Answer 48

Neurovascular compression at root entry zone of trigeminal nerve

Question 49

Septum pellucidum lesion, iso T1 and T2, enhances with gadolinium

Answer 49

Central neurocytoma

Question 50

Large sella and hypertelorism

Answer 50

Hypothyroidism

Question 51

Orbital cavernous malformation aka

Answer 51

Orbital haemangioma

Question 52

Silent sinus syndrome

Answer 52

Progressive facial symmetry with unilateral enophthalmos. Complete opacification and volume loss of affected sinus

Question 53

Swollen external auditory canal with bony destruction, diabetic

Answer 53

Necrotizing otitis media

Question 54

Hangman fracture, no neuro deficit, Rx

Answer 54

Hard cervical collar

Question 55

OMU consists of

Answer 55

Hiatus semilunaris, Ethmoid bulla Uncinate process Maxillary infundibulum

Question 56

Incidental FDG avid thyroid nodule

Answer 56

40% chance f malignancy