Spine and Pelvis 2

Question 1

Legg-Calve-Perthes

Answer 1

• Increased medial joint space (waldenstrom sign)
• Fragmentation
• Sclerosis
• Metaphyseal widening and shortening

Question 2

Avascular Necrosis

Answer 2

• Articular collapse
• Fragmentation and Subchondral fracture (Crescent Sign)
• Sclerosis (snowcap’s sign)
• Signs of degenerative changes

Question 3

Fibrous dysplasia

Answer 3

happens when abnormal fibrous (scar-like) tissue replaces healthy bone

• ## Tumor matrix

Question 4

Achondroplasia (dwarfism) Radiographic

Answer 4

• Champagne Glass Pelvic
• Ilia are short and square
• Sharp sacrosciaticnotches
• Interpediculate distance narrows

Question 5

Ankylosing Spondylitis (AS)

Answer 5

• Genetic marker HLA-B27
• Diminished chest expansion
• Bilateral, symmetrical erosion

Radiographic phases
1. Pseudo-widening
2. Erosive and Sclerotic changes
3. Ankylosis

Question 6

Coccygeal Fracture

Answer 6

Angulation or anterior displacement of distal fragment

Question 7

Duverney fracture

Answer 7

splitting of iliac wing

Question 8

Straddle fracture

Answer 8

superior and inferior pubic ramus fracture

Question 9

Malgaigne fracture

Answer 9

ipsilateral double vertical fracture of superior and inferior pubic ramus and SIJ dislocation

Question 10

Sprung pelvis

Answer 10

Diastasis of pubic symphysis