Arab Board Orthopedic MCQs Online Bank - Improve Your Knowledge and Skills

Arab Board Orthopedic MCQs Online Bank - Improve Your Knowledge and Skills

1. Which of the following is the most important structure, which when divided or resected would allow maximum seating of the femoral head within the acetabulum, following surgical reduction of a high riding DDH?

1. A. Pulvinar fat pad
2. B. Hip capsule
3. C. Limbus
4. D. Transverse ligament
5. E. Iliopsoas tendon
   Answer: D. Transverse ligament
   The transverse ligament is the most important structure for seating the femoral head within the acetabulum following surgical reduction of a high-riding developmental dysplasia of the hip (DDH).

2. In what way does femoral shortening ease best the reduction of a high riding hip, in DDH?

1. A. Relaxes the two joint muscles
2. B. Derotates the hip
3. C. Promotes varus of the hip
4. D. Allows a better capsulorhaphy
5. E. Removes the hourglass capsular deformity
   Answer: B. Derotates the hip
   Femoral shortening eases the reduction of a high riding hip in DDH by derotating the hip.

3. Should a flat acetabulum be present in patients with DDH (2-5 years), the best surgical technique used in the management, would be:

1. A. A varus osteotomy of the hip
2. B. A Salter osteotomy
3. C. A Dega osteotomy
4. D. A Chiari osteotomy
5. E. A hip derotation osteotomy
   Answer: C. A Dega osteotomy
   A Dega osteotomy is the best surgical technique for management in patients with DDH with a flat acetabulum (2-5 years).

4. An eight-year-old male with a Herring B/C hip is best treated with:

1. A. Traction
2. B. An Atlanta brace
3. C. A Petrie cast
4. D. A Snyder sling
5. E. Surgical intervention
   Answer: E. Surgical intervention
   An eight-year-old male with a Herring B/C hip is best treated with surgical intervention.

5. In Legg-Calve’-Perthes disease ending with a Stulberg IV deformity, what is the most likely outcome?

1. A. No problems throughout life
2. B. Continuous hip pain throughout life
3. C. Considerable stiffness in the hip throughout life
4. D. Living normally but with an increased risk of degenerative arthrosis at the age of fifty
5. E. Candidates for a Total Hip Arthroplasty, prior to the age of forty years
   Answer: D. Living normally but with an increased risk of degenerative arthrosis at the age of fifty
   In Legg-Calve’-Perthes disease ending with a Stulberg IV deformity, the patient is expected to live normally but experience an increased risk of degenerative arthrosis at the age of fifty.

6. To distinguish between hips in patients with Gaucher’s disease and Legg Perthes (LCP) disease, what is the difference?

1. A. The former (Gaucher’s Disease), both hips are involved at the same time while LCP disease (when bilateral) is involved at different times
2. B. The hips are more severely involved in Gaucher’s disease
3. C. LCP disease has an accumulation of cerebrosides within the hip and not in Gaucher’s disease
4. D. Gaucher’s disease has various stages of hip involvement which are not present in LCP disease
5. E. LCP disease is always curable when treated with an abduction which is not present in Gaucher’s disease
   Answer: D. Gaucher’s disease has various stages of hip involvement which are not present in LCP disease
   In patients with Gaucher’s disease and Legg Perthes disease, the distinguishing feature is that Gaucher’s disease has various stages of hip involvement that are not present in LCP disease.

7. Any child presenting with severe back pain involving the whole spine prior to the age of six should be investigated for:

1. A. Leukemia
2. B. Discitis
3. C. Disc calcification
4. D. Syringomyelia
5. E. Tethered cord
   Answer: B. Discitis
   A child presenting with severe back pain involving the whole spine prior to the age of six should be investigated for discitis.

8. An osteoid osteoma, when located in the spine, results in scoliosis that occurs at the wrong time and place. When so, where is the nidus found?

1. A. Endvertebra
2. B. Neutral vertebra
3. C. Convex side of the curve
4. D. At the apex on the concave side of the curve
5. E. Vertebral body
   Answer: D. At the apex on the concave side of the curve
   When an osteoid osteoma is located in the spine, resulting in scoliosis, the nidus is found at the apex on the concave side of the curve.

9. The organism that most commonly results in discitis is:

1. A. Streptococci
2. B. E. Coli
3. C. Pseudomonas
4. D. Staphylococcus aureus
5. E. Haemophilus influenzae
   Answer: D. Staphylococcus aureus
   Staphylococcus aureus is the organism that most commonly results in discitis.

10. Following a traumatic dislocation of the patella, which structure, when injured, is most likely to result in recurrent patella dislocation?

1. A. The infrapatellar tendon
2. B. The vastus medialis
3. C. The lateral femoral condyle
4. D. The medial patellofemoral ligament
5. E. The vastus intermedius
   Answer: D. The medial patellofemoral ligament
   When the medial patellofemoral ligament is injured, it is most likely to result in recurrent patella dislocation following a traumatic dislocation of the patella.
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