Arthritis

Question 1

New York criteria for sacroilitis grading?

Answer 1

grade 0: normal

grade 1: some blurring of joint margins

grade 2: minimal sclerosis with erosion

grade 3: definite bilateral sclerosis, severe erosions with widened joint space +/- ankylosis

grade 4: complete ankylosis

Question 2

Nonuniform narrowing of joint space is typical of __ and __?

Answer 2

OA and erosive OA

Question 3

Pencil-in-cup deformity most common in _ ?

Answer 3

psoriatic arthritis

Question 4

Difference between primary vs secondary OA on XR?

Answer 4

primary OA: nonuniform joint space loss

secondary OA: uniform joint space loss

Question 5

Radiographic hallmarks of OA?

Answer 5

normal minerization

nonuniform joint space loss

• absence of erosion
• subchondral new bone formation
• osteophyte
• cysts
• subluxations
• unilateral/bilateral asymmetrical distribution
• distribution in hands, feet, knees, hips sparing shoulders & elbows

Question 6

Primary OA in wrist involve which joints?

Answer 6

• between base of 1st metacarpal & trapezium
• between trapezium & scaphoid(triscaphe joint)

Question 7

For primary OA, which wrist joint will have radial subluxation?

Answer 7

radial subluxation of vase of 1st metacarpal in relationship to trapezium

Question 8

Age group of erosive athritis?

Answer 8

postmenopausal females

Question 9

What is erosive OA?

Answer 9

inflammatory component superimposed on OA

Question 10

Erosive OA vs psoriasis?

Answer 10

• psoriasis has no osteophyte formation, erosions are marginal, mouse ears appearance of joint
• erosive OA has osteophytes, erosions are central in location, seagull appearance of joint