FM - Coronary Artery Disease

Question 1

List the 3 imaging modalities used to investigate OA.

Answer 1

1. Plain films
2. Radionuclide scanning
3. CT and MRI

Question 2

What are the most useful form of imaging to evaluate OA?

Answer 2

Plain radiographs (diagnostic)

Question 3

What is the practical value of CT/MRI in evaluating OA?

Answer 3

• Showing other abnormalities associated with OA in imaging sites that are inaccessible to plain radiography (herniated disc, spinal stenosis, etc.)
• Excluding other disorders in the DDx

Question 4

Findings of OA in plain radiographs?

Answer 4

1. Joint space narrowing from loss of cartilage; asymmetrical, may be the only finding in early disease
2. Subchondral bone sclerosis, increased bone density
3. Subchondral cysts
4. Osteophytes (bone spurs)
5. Central bone erosions that occur in distal interphalgeal joins of fingers (unlike RA)
6. Deformities
7. Heberden and Bouchard nodes
8. No juxta-articular osteoporosis as seen in RA

Question 5

Bouchard nodes are osteophytes of the ___ interphalangeal joints vs. Heberden nodes, which are osteophytes o the ___ interphalangeal joints.

Answer 5

Proxima; distal

Question 6

Findings of OA in the hand?

Answer 6

Joint space narrowing

Bouchard and Heberden nodes

Question 7

Findings of OA in the knee?

Answer 7

Osteophytes
Subchondral sclerosis
Varus deformity

Question 8

Findings of OA in the spine?

Answer 8

Narrowed disc space and osteophytes
Sclerosis
Narrowed facet joints
Narrowed neural foramen

CT - vacuum phenomenon
MRI - herniated disc, spinal stenosis

Question 9

Findings of OA on bone scan?

Answer 9

Symmetrical increased isotope accumulation