Ch 18 Juvenile orthopaedic disease

Question 1

Answer 1

C - distomedial aspect*

Question 2

Answer 2

B - *chondrodysplasia

Question 3

Answer 3

D

Question 4

Answer 4

C * male cats

Question 5

Answer 5

B *5-12 mo

Question 6

Answer 6

C

Question 7

Answer 7

D

Question 8

Answer 8

B

Question 9

Answer 9

B

Question 10

Answer 10

C

Question 11

Answer 11

D

Question 11

Answer 11

A

Question 12

Answer 12

B

Question 13

Answer 13

C

Question 14

Answer 14

A

Question 15

Answer 15

B

Question 16

Answer 16

C (medial)

Question 17

Answer 17

C

Question 18

Answer 18

D

Question 19

Answer 19

C

Question 20

Answer 20

A (type 1)

Question 21

Answer 21

D

Question 22

Answer 22

C

Question 23

Answer 23

B

Question 23

Answer 23

A

Question 24

Answer 24

A

Question 25

Answer 25

B

Question 26

Answer 26

B (type 1 collagen)

Question 27

Answer 27

C

Question 28

Answer 28

B

Question 29

Answer 29

B

Question 30

Answer 30

C

Question 31

Answer 31

A

Question 32

Answer 32

B, C

Question 33

Answer 33

B

Question 34

Answer 34

C, D

Question 35

Answer 35

C

Question 36

Answer 36

A, B

Question 37

Answer 37

A

Question 38

Answer 38

B

Question 39

Cause of OCD?

Answer 39

Failure of endochondral ossification, due to necrosis of the epiphyseal cartilage

Question 40

(4) OCD locations in dogs

Answer 40

Shoulder - caudal humeral head Elbow - distomedial humeral trochlea Hock - medial/lateral trochlear ridge of talus Stifle - medial/lateral femoral condyles

Question 41

Answer 41

OCD distomedial humeral trochlea

Question 42

Answer 42

OC lateral femoral condyle; flattening, with focal lucency surrounded by area of sclerosis

Question 43

Answer 43

OCD medial trochlear ridge of talus A: small bone flap, sclerosis B: flattened trochlear ridge, widened tarsocrural joint, osteophyte distal tibia and dorsal talus

Question 44

What is a kissing lesion?

Answer 44

subchondral bone defect opposite an OCD lesion (friction injury from an unstable fragment)

Question 45

Why might conventional orthogonal radiographs be insufficient to diagnose lateral trochlea of the talus OCD, and what else could you do to diagnose this (on radiographs)?

Answer 45

- dorsoplanar view could leave the calcaneus superimposed - you could do a flexed DP .. or... an oblique (dorsolateral - plantaromedial)

Question 46

What falls under the umbrella term elbow dysplasia?

Answer 46

UAP MCD OCD (joint incongruity)

Question 47

Answer 47

OCD; a fragment is present in the bicipital groove.

Question 48

Anconeal process fuses to the olecranon at what age?

Answer 48

150 days (5 months)

Question 49

Clinical signs of MCP can be seen as early as

Answer 49

4 months

Question 50

MCP is more common in males - true or false?

Answer 50

True

Question 51

Congenital radial head luxation occurs in which direction? at what age?

Answer 51

caudolateral 3-4 mo of age

Question 52

Answer 52

Congenital caudolateral radial head luxation

Question 52

Answer 52

MCP + Ddx humeral OCD, kissing lesion

Question 53

In a normal hip, the dorsal acetabular cup covers ____% of the femoral head.

Answer 53

more than 50

Question 54

Which parameter has a high correlation with heritability of hip dysplasia?

Answer 54

Distraction index i.e. hip laxity

Question 55

Answer 55

Hip dysplasia with enthesophytes at the joint capsule insertion (Morgan's line)

Question 56

What is Morgan's line?

Answer 56

Enthsophytes at the insertion of the joint capsule on the femoral neck

Question 57

Osteophytes in cats with hip dysplasia have a predilection for which site?

Answer 57

cranial acetabular rim

Question 58

Cats with hip dysplasia will have marked femoral neck remodeling and a shallow acetabular cup - true or false?

Answer 58

False - they will have little remodelling, so you may see a shallow acetabulum and some osteophytosis at the cranial acetabular rim.

Question 59

The smaller the DI (for hip laxity), the less laxity present - true or false?

Answer 59

true