Bone Radiology

Question 1

Answer 1

soft tissue swelling RA

Question 2

Answer 2

sausage digits in psoriatic arthritis

Question 3

Answer 3

gout

Question 4

Answer 4

demineralized bone in RA

Question 5

Answer 5

increased bone density in psoriatic arthritis

Question 6

uniform joint space narrowing

Answer 6

think INFLAMMATION: RA, septic arthritis, seroneg spondyloarthropathy

Question 7

non-uniform joint space narrowing

Answer 7

think DEGENERATIVE: OA or CPPD

Question 8

Answer 8

left RA, right OA

Question 9

in what rheumatologic conditions are there only small or focal defects (joint space preserved)?

Answer 9

gout, pigmented villonodular synovitis, “early” OA

Question 10

where do marginal erosions happen first?

Answer 10

“uncovered” bone at margin of joint

Question 11

in which conditions do you see marginal erosions?

Answer 11

RA, psoriatic arthritis, reactive arthritis

Question 12

Answer 12

RA w/ marginal erosions

Question 13

Answer 13

gout:

• erosions may be remote from joint
• overhanging edge of bone

Question 14

in what conditions do you see subluxation

Answer 14

with erosions: RA

w/out erosions: SLE

Question 15

Answer 15

subluxation w/out erosion = lupus

Question 16

bone production findings

Answer 16

OA: osteophytes, subchondral bone

Seroneg spondy: periosteal new bone, ankylosis

Gout: overhanging edge

Question 17

Answer 17

subchondral bone - OA

Question 18

Answer 18

reactive arthritis

Question 19

Answer 19

left: ankylosing spondylitis
right: DISH

Question 20

Answer 20

bulky calcifications in scleroderma

Question 21

Answer 21

calcifications: pyrophosphate arthropathy or normal aging

Question 22

Answer 22

calcific tendonitis