Masterpass Paeds 3

Question 1

Hypoplastic sternum & thin ribs, overlapping 2nd and 3rd digits, small head

Answer 1

Trisomy 18

Question 2

Enlarged left kidney, poor corticomedullary differentiation. Difficult birth, maternal DM

Answer 2

Renal vein thrombosis

Question 3

Marfans vs Homocysteinuria spine

Answer 3

Posterior scalloping vs Biconcave vertebrae

Question 4

Alpha angle associated with instability vs dislocation

Answer 4

43-49 degrees vs <43 degrees

Question 5

TS triad

Answer 5

Angiofibromas, epileptic seizures, mental retardation

Question 6

Commonest causes of cyanosis in neonate

Answer 6

Transposition (symptomatic around 1-2 weeks(

Question 7

<6 months old, UTI, fails to respond within 48hrs Abx. Ix?

Answer 7

US during acute stage, MCUG and DMSA 4-6 months later

Question 8

Calcifications in enlarged cardiac sillhouette

Answer 8

Teeth (teratoma)

Question 9

Missed testicular torsion US

Answer 9

Enlarged, hypoechoic testis with increased peritesticular vascularity and decrased parenchymal vascularity

Question 10

Cerebellar ataxia, recurrent chest infections and telangectasia

Answer 10

Ataxia Telangiectasia

Question 11

False negatives in Meckel’s scan

Answer 11

Malrotation of ileum,
Recent barium enema,
Irritable bowel causing rapid transit,
small amount of ectopic gastric mucosa

Question 12

Lucent lesion in metaphysis, well defined sclerotic margin, no periosteal reaction

Answer 12

Chondromyxoid fibroma

Question 13

Gas filled loops of bowel in central chest

Answer 13

Morgagni hernia

Question 14

Iso T1, hyperintense T2 lesion with multiple cysts and rim of low signal in brain

Answer 14

Pilocytic astrocytoma

Question 15

Lucent lesion in spinous process, pain worse at night

Answer 15

Osteoblastoma

Question 16

Wilsons disease liver attenuation

Answer 16

Can be normal, high from copper cancelled by low from fat

Question 17

Commonest cause of communicating hydrocephalus

Answer 17

Repetitive subarachnoid microhaemorrhage

Question 18

Osteoid osteoma

Answer 18

Well demarcated low attenuation lesion a few mm in size, surrounded by area of high attenuation, within cortex of long bones

Question 19

Great vessel aneurysm on CXR

Answer 19

Middle mediastinal soft tissue mass

Question 20

Commonest appearance of congenital hypothyroid

Answer 20

Ectopic thyroid tissue in suprahyoid position

Question 21

Hypersegmented manubrium associated with

Answer 21

Down’s

Question 22

Rhabdomyosarcoma of the biliary tract

Answer 22

Heterogenous, soft tissue mass in porta hepatis with high doppler flow. Intra and extra-hepatic dilatation