SA Metabolic Bone Disease

Question 1

Signalment: Panosteitis

Answer 1

GSD common
Self-limiting
Long bones
5-18m

Question 2

What does panosteitis look like on radiographs?

Answer 2

Ill- or well-defined patches of variably faint sclerosis in the medullary cavity
No lysis

Question 3

Answer 3

Panosteitis

Question 4

Answer 4

Panosteitis

Question 5

Answer 5

Panosteitis

Question 6

Signalment: Hypertrophic Osteodystrophy

Answer 6

Large breed
2-7m
Febrile and lame in more than one limb

Question 7

Answer 7

Hypertrophic osteodystrophy

Question 8

What does hypertrophic osteodystrophy look like radiographically?

Answer 8

Irregular lucent line in metaphysis parallel to normal physeal line - double physis
+/- adjacent sclerosis

Question 9

Answer 9

Hypertrophic osteodystrophy

Question 10

Answer 10

Hypertrophic osteodystrophy

Question 11

Answer 11

Hypertrophic osteodystrophy with mild periosteal proliferation

Question 12

Answer 12

Hypertrophic osteodystrophy with moderate irregular periosteal proliferation

Question 13

Answer 13

Chronic hypertrophic osteodystrophy
Mild periosteal “cupping”

Question 14

Answer 14

Chronic hypertrophic osteodystrophy
Mild periosteal “cupping”

Question 15

Signalment: Retained cartilage core

Answer 15

Large to giant breed dogs
Distal ulna most common
Can see secondary limb deformities

Question 16

What can be seen radiographically with retained cartilage core?

Answer 16

Lucent, conical cartilage core in medullary region of ulnar metaphysis

Question 17

Answer 17

Retained cartilage core

Question 18

Answer 18

Retained cartilage core

Question 19

What disease processes result in osteopenia?

Answer 19

Hyperparathyroidism
Humoral hypercalcemia of malignancy
Disuse osteopenia
Hypovitaminosis D
Osteogenesis imperfecta

Question 20

What disease processes result in too much mineral?

Answer 20

Hypervitaminosis A
Osteopetrosis
Acquired diffuse osseous sclerosis
Polyostotic hyperostosis

Question 21

What are the radiographic findings of hyperparathyroidism?

Answer 21

Cortical thinning
Decreased bone density
Loss of definition of trabecular pattern and loss of lamina dura

Question 22

What are the radiographic findings of nutritional secondary hyperparathyroidism?

Answer 22

Same as for hyperparathyroidism
+/- angular fractures
+/- angular limb deformities

Question 23

Answer 23

Folding fracture d/t nutritional secondary hyperparathyroidism

Question 24

What are the radiographic findings of renal secondary hyperparathyroidism?

Answer 24

Loss of bone density (worse in skull)
Early = loss of lamina dura
Late = fibrous osteodystrophy

Question 25

Answer 25

Renal secondary hyperparathyroidism

Question 26

Answer 26

Renal secondary hyperparathyroidism

Question 27

What are the radiographic findings of disuse osteopenia?

Answer 27

Overall decreased opacity +/- coarse trabecular pattern in medulla