Neurolocomotor Imaging

Question 1

what are the key steps in describing a lesion

Answer 1

Location

• ex. Caudal aspect of elbow proximal to ulna

Size

• Large (relative)

Opacity

• Mineralized or bone

Shape

• Square

Structure

• Well defined trabecular pattern (looks like bone)

Margins

• Sharp

Number

• Uni/bilateral
• Other elbow?

Question 2

what is osteolysis

Answer 2

bone loss

Question 3

what is osteopenia

Answer 3

general reduction in bone opacity

Question 4

what % of bone loss will be radiographically visisble

Answer 4

30-50%

Question 5

how would you describe bone loss

Answer 5

Reduced density/opacity

Destruction/lysis

Question 6

what are the types of bone destruction/lysis

Answer 6

1. geographic
2. moth eaten
3. permeative

Question 7

what is geographic bone loss

Answer 7

single

well defined

may thin cortex

benign usually

Question 8

what are moth eaten lesions

Answer 8

mutliple

variable size

may coalesce

less well defined

more aggressive

Question 9

hat are permeative lesions

Answer 9

dissolving

poorly defined

cortical erosion

highly aggression (neoplasia, infection)

Question 10

what is sclerosis

Answer 10

increased bone matrix

Question 11

what are the periosteal new bone patterns

Answer 11

1. smooth, solid – callus
2. codman’s triangle
3. rough, solid
4. lamellar/onion skin
5. brush border
6. pallisading
7. spicular
8. sunburst
9. amorphous

Question 12

what causes increased matrix

Answer 12

compaction

increased trabeculation

dead bone (sequestrum) +/- involucrum

Question 13

what is monostotic

Answer 13

primary bone lesion

fracture

Question 14

what is polystotic

Answer 14

osteoarthritis

metabolic disease

bone mets

joint neoplasia