Approach to MSK Imaging

Question 0

lytic lesion?

Answer 0

region of bone destruction

Question 1

Sclerotic lesion?

Answer 1

increased density of bone

Question 2

radiolucent look?

Answer 2

darker

Question 3

bone lysis: well defined margins means?

Answer 3

has repair going on, eg. bone cyst

Question 4

bone lysis, what is ill defined margins?

Answer 4

lymphoma outstrips repair

Question 5

codman’s triangle happens when?

Answer 5

lesion growing too fast for periosteum to ossify

Question 6

if fast periosteal new bone growth, could mean? what signs?

Answer 6

sarcoma
sunburst pattern
codman’s triangle

Question 7

exostosis means?

Answer 7

projection of bone that is abnormal

Question 8

endosteal bone is where?

Answer 8

bone along inner margin of cortex

Question 9

parosteal is where?

Answer 9

regiong near but external to the periosteum

Question 10

fat pads in elbow, how to tell is joint effusion?

Answer 10

fat pads are elevated away from bone

Question 11

looking along cortical bone, you look for 2 things

Answer 11

fracture?

periosteal new bone/exostosis?

Question 12

soft tissue on x-ray look for what 4 things?

Answer 12

masses
calcification
ossification
gas

Question 13

what 4 things to look for in growth plates?

Answer 13

symmetry
displacement
osteonecrosis
fragmentation

Question 14

salter harris fracture?

Answer 14

grades fractures through growth plates

Question 15

how can white lines indicate fracture?

Answer 15

double density due to overlap

Question 16

fracture mimics? 2

Answer 16

nutrient foramen

epiphyseal plate