PBR MSK

Question 1

• Joint space narrowing
• Osteophyte formation
• Sclerosis
• No osteopenia or erosions

Answer 1

Osteoarthritis (OA)

“J.O.S.”

Question 2

• Joint space narrowing.
• Osteoporosis
• Marginal erosions
• Soft-tissue swelling
• Bilaterally symmetrical specially in the hands
• Pencil-in-cup deformity may be seen (Primarily in Psoriatic arthritis)

Answer 2

Rheumatoid arthritis (RA)

“J.O.MAR.STS”

Question 3

• Punch-out erosions
• Overhanging sclerotic margins/edges - Periarticular soft tissue swelling

Answer 3

Gout

Question 4

Rat bitten / Mouse bite lesions appearance

Answer 4

Gout

Question 5

• Erosions
• Cortical destruction
• Soft tissue swelling

Answer 5

Osteomyelitis

Question 6

Loss of normal half moon overlap sign

Answer 6

Posterior shoulder dislocation

Question 7

• Flattening with subsequent sclerosis involving femoral heads
• Loss of joint space involving the acetabulofemoral joint

Answer 7

Avascular necrosis

Question 8

• Symmetrical and Bilateral sacroilitis (first manifestation)
• Bamboo spine (squaring of vertebral vertebrae)
• Dagger spine (linear ossification of interspinous ligament along the central spine)
• Shiny corner sign (Romanus lesions)
• Bridging/fusion of pubic symphysis

Answer 8

Ankylosis spondylitis

Question 9

• Swan neck deformity
• Boutonniere’s deformity

Answer 9

Rheumatoid arthritis

“Wan (1) Button RA (Rebuildable atomizer)”

Question 10

• Joint space narrowing
• Extensive subchondral sclerosis
• Polyarticular chondrocalcinosis
• May involve knee, wrist, pelvis, shoulder

Answer 10

Calcium pyrophosphate dihydrate deposition (CPPD) disease / Pseudogout