Arab Orthopaedic Board MCQs - Part 2

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:

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

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

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

In Legg-Calve’-Perthes disease ending with a Stulberg IV deformity is most likely to:

To distinguish between hips in patients with Gaucher’s disease and Legg Perthes (LCP) disease is that:

Any child presenting with severe back pain involving the whole spine prior to the age 6 years should be investigated for:

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

The organism that most commonly results in discitis is:

Following a traumatic dislocation of the patella, the structure when injured would, Most likely result in recurrent patella dislocation is:

In adolescents, the most likely mechanism of injury to the lumbosacral spine, that could lead to a spondylolysis, would be:

In acquired flat foot in an adult the tendon that is usually involved, would be:

The parents of a 13 year old boy known to have tuberculosis, notice swelling in upper right buttocks. He was presumed to have migration of the abcess posteriorly. This would be through which path:

A ten year old boy presented with low back pain. Plain xrays revealed flattening of the vertebral bodies at level L2 and L4. Your first diagnosis, would be:

When a Margeryl transarticular screw is inserted between C1-2 and is slightly long and passes anterior through the C1 facet, may lead to a unilateral deviation of the tongue. Which of the following nerves is injured:

During anterior spinal surgery, the left vertebral artery was injured. Should the artery be ligated, what would the incidence of brain stem infarction be:

During anterior spinal surgery when the esophagus is injured and detected late 48 hours postoperatively, the mortality risk is estimated to be:

in which of the following cervical vertebrae, the pedicle is of sufficient diameter to allow the insertion of a pedicle screw:

The differential diagnosis of most bone tumors is derived from which of the following radioimaging techniques:

Patients with osteoid osteomas are known to have pain, more severe at night. This is most probably due to:

With which of the following lesions listed below, osteoid osteoma, is very similar on pathologic analysis:

Telangiectatic osteosarcoma is most commonly confused with:

A focus of mature compact (cortical) bone within the cancellous bone is known to occur in:

A condition, associated with intestinal polyposis and multiple osteomas, would be:

Which of the following nerves is most likely to be injured on correction of cervical kyphosis:

A 14 year old boy complains of pain along the medial aspect of the thigh, more severe at night. A bone scan reveals a double density sign with maximum uptake in the center of 1cm diameter lesion. The most likely diagnosis would be:

When a patient presents with multiple exostosis and the direction of the stalk points towards the joint, the diagnosis would be most likely:

Absorption of phosphate from the intestine is mainly from:

Giving parathormone at alternate times is:

PTH increase results in:

The Hormone that in inhibits osteoclast mediated bone resorption is:

Which of the following conditions is known to be associated with an Erlenmeyer-flask deformity of the distal femur and bone necrosis:

Parathormone is produced by which of the following cells:

In the kidneys parathormone stimulates:

Intermittent administration of parathormone (1-34 parathormone) results in:

Clearance of parathormone occurs mainly through the:

the C-terminal of pathormone is cleared mainly in the:

The main action of Vitamin D3 is on the:

Which of the following interferes most with the absorption of calcium from the intestine:

Phosphorous is absorbed into the body mainly through the:

Which of the following is most likely to interfere with the absorption of phosphorous from the intestines:

Which of the following peptide is secreted by the parafollicular cells of the thyroid gland:

Which of the following when present, would result in shrinkage of the osteoclast:

PTHrP (parathormone related protein) is produced mainly in:

Fibroblast Growth Factor 23 (FGF23) is the principal phosphaturic hormone and is produced by:

The principal actions of FGF23 are:

Low-turnover osteoporosis is characterized most by:

Umbo Zonen occurring on the concave side of a deformed tibia in an adult is indicative of which of the following conditions:

Flaring of the wrist (clubbing) with widening of the physis is indicative of:

All the following have been elicited as causes of rickets except: