Arab Orthopaedic Board MCQs - Part 20

A condition associated with intestinalpolyposis 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 femur and bone necrosis:

Parathormone is produced by which of the following:

In the kidneys, parathormone stimulates:

Intermittent administration of 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:

Phosphorous deficiency rickets is associated with the intake of which of the following medications:

Which of the following has been associated with myopathy in osteomalascia:

The most probable explanation for patients to have gastric rickets is:

The basic cause of biliary rickets is:

All the following conditions are causes of enteric rickets except:

Type I vitamin D-dependent rickets is related to:

When rickets is associated with Albright’s syndrome (X-linked dominant condition) is due to:

The Fanconi syndrome when it first presents in adults is most liked caused by:

All the following have been associated with Fanconi syndrome, except:

Oncogenic osteomalascia is associated with:

All the following tumors have been associated with osteomalascia except:

FGF23 produced by primary malignant tumors know to be associated with osteomalascia results from:

Chronic anticonvulsant therapy leading to osteomalascia, is believed to be due to all the following, except:

A 3 year old boy following a minor fall and on plain xrays of the wrist, was noted to have pelkan spurs, Wimburger’s line and a Fraenkel line. Your most likely diagnosis would be:

A significant difference between balloon kyphoplasty and vertebroplasty is that:

Absolute contraindications to both kyphoplasty and vertebroplastyinclude all except:

The extrapedicular approach in kyphoplasty is most commonly used at the:

A 4ST (hamstring graft is estimated to be equivalent in strength to a normal ACL (in percent):

In which of the following injuries mechanoreceptor function is lost:

Which of the following cancers metastasize least to bone:

Which of the following lesions in bone would benefit most from embolization:

Which of the following cancerous primary sites, is known to be associated with acro- metastases:

Which of the following malignancies can present with the radiologic appearance of an ivory vertebra: f. Chondrosarcoma g. Breast h. myeloma i. Renal j. Thyroid