Final

Question 1

What tumor has a solid periosteal reaction, cortical thickening and sclerotic borders w/radiolucent central nidus?

Answer 1

osteoid osteoma

Question 2

What are the imaging features of osteoblastoma?

Answer 2

nidus bigger than osteoid osteoma w/thing eggshell border

Ca++ can occurs w/in center of nidus

Question 3

What condition is poorly defined, has NO periosteal reaction or ST mass?

Answer 3

Mets

Question 4

What condition has an ivory vertebra (blastic) and winking owl sign (lytic)?

Answer 4

mets

Question 5

In the appendicular skeleton saber skin tibia, shepherds crook deformity and candle flame/blade of grass appearance?

Answer 5

Paget’s dz

Question 6

Paget’s disease displays what features in the spine?

Answer 6

Ivory white vertebra
Picture frame cortical thickening
Corduroy cloth appearance
A. Scalloping

Question 7

Enostoma aka Bone Island appearance is ill defined or well defined and has what type of borders?

Answer 7

well defined
brush border (spicules)

Question 8

What does hemangioma look like in the spine?

Answer 8

corduroy cloth appearance

polka dot appearance on axial imaging

Question 9

What is the appearance of an hemangioma on film in the skull?

Answer 9

spoked-wheel w/sunburst appearance

Question 10

What is the mc

Benign tumor of sacrum and patella?

Answer 10

GCT

Question 11

What is the appearance of GCT on film?

Answer 11

well defined
highly expansile
soap bubble appearance
NO sclerotic boarder

Question 12

What tumor condition has geographic destruction, highly expansile, can cross growth plate, periosteal Buttressing (pathomneumonic) and shows fluid on MRI?

Answer 12

ABC

Question 13

What’s the pathomneumonic of ABC?

Answer 13

periosteal buttressing

Question 14

What is the mc benign tumor of the hand?

Answer 14

Enchondroma

Question 15

What hand condition is Well Defined, geographic destruction, cortical expansion and cartilage tumor matrix?

Answer 15

Enchondroma

Question 16

What is the mc benign bone tumor of the body?

Answer 16

Osteochondroma

Question 17

What are the two-forms of osteochondroma in the bone?

Answer 17

Pedunculated (cauliflower)

Sessile (Mountain)

Question 18

Which form of osteochondroma is more likely to be fractured?

Answer 18

pedunculated

Question 19

What is the appearance of acute osteomyelitis?

Answer 19

ST edema (earliest sign)
lytic destruction
periosteal elevation

Question 20

What imaging features are associated w/periarticular swelling, joint space widens early but narrows late stage?

Answer 20

septi arthritis (osteomyelitis)

Question 21

No periosteal reaction, No ST swelling, cortical thickening, ill defined lucency and sclerosis, presence of sequestrum/involucrom/cloaca are associated with what?

Answer 21

Chronic osteomyelitis

Question 22

What looks like osteoid osteoma, but present w/infection symptoms. Lucent nidus and Lucent channel of healing leading into physis and sclerotic border?

Answer 22

Brodie’s access

Question 23

Infectious spondylodiscitis appears how in under 20 yoa?

Answer 23

narrow disc height

paraspinal edema

Question 24

Infectious spondylodiscitis appears how in over 20 yoa?

Answer 24

radiolucent focus at Anterior vertebral endplate and late disc involvement