Arab Orthopaedic Board MCQs - Part 21

Which of the following conditions is associated with resorption of the tufts of the distal phalanges of the hand:

Osteosarcoma of the sacrum in a 60 year old man is most probably secondary to:

When Ewing Sarcoma presents as a solitary lesion in the spine, it is most commonly located in the:

In which portion of the spine does Ewings sarcoma (When present) has the worse prognosis:

In infants younger than four months old, when clinical suspicion of DDH exists, the best radio-imaging used to assist in the diagnosis, would be:

All the following are considered risk factors for DDH, except:

The incidence of club foot deformity is increased four times in which of the following:

Which of the following radio-imaging techniques is most useful to confirm reduction of DDH while in a hip spica:

Indicate which of the following facets is the largest and the major weight-bearing surface of the subtalar joint:

Lateral ligamentous support of the subtalar joint arises from all, except:

On comparing pediatric spines less than 8 years of age, to those in adults, certain differences are noted which include all, except:

The spinal cord ends at what level in newborns:

In distraction injuries of the spine in children, the deforming tension force is commonly translated through which portion of the vertebra:

The accepted explanation why children have a higher incidence of abdominal injuries following thoracolumbar distraction injuries, would be:

One of the following statements, does not stand up as an advantage of a percutaneous biopsy:

All the following are contraindications to limb salvage procedures, except:

With the advent of neoadjuvant chemotherapy and advances in radiation therapy techniques, the 5-year survival rate of osteosarcoma has improved to:

The primary stabilizer of the elbow is:

The primary constraint to valgus stress at the elbow joint is:

The secondary stabilizer against valgus stress of the elbow:

The radial head articulates medially with:

The proximal dorsal angulation located nearly 5 cm distal to the tip of the olecranon measures:

The anterior band of the medial collateral ligament inserts on:

The structure that inserts on the crista supinatoris on the lateral proximal ulna at the point where the supinator crest blends with the radial notch, would be:

An isolated coronoid tip fracture seen on an otherwise normal radiograph is suggestive of:

The terrible triad injury of the elbow results from a valgus with additional posterolateral force and consists of a combination of:

When a giant cell tumor arises in children, its primary site of location would be in the:

Which of the following lesions does not occur in the epiphysis of long bones:

Which of the following lesions on MRI does not have fluid-fluid levels:

The lesion shown in the plain x-ray below, is most probably which of the following conditions listed below:

What is your most likely diagnosis of the lesion shown in the x-ray below: a. Osteoid osteoma b. Bone island c. Osteoblastoma d. Nonossifying fibroma e. Chondroma

A15 year old boy presents to your clinic having an x-ray that reveals an irregularity in the posteromedial aspect of the distal metaphysis of the femur. Your most likely diagnosis would be: f. Parosteal osteosarcoma g. Osteochondroma h. Periosteal desmoid i. Periosteal chondroma j. Periosteal osteosarcoma

The x-ray below is that of the tibia of an adolescent boy. What is your most likely diagnosis:

A seventeen year old male complained of severe neck pain localized to the posterior mid-aspect of the neck. A plain xray of the cervical spine was taken, and a lateral view is shown below. Your most likely diagnosis, would be:

A 13 year old girl presents with shoulder pain and limitation of all ranges of motion. A plain xray is shown below. What is your diagnosis:

Which of the following lesions is the counterpart of a chondroblastoma in adults:

Malignant fibrous histiocytoma of bone is known to occur secondary to all the following lesions, except:

Which of the following types of osteosarcoma has a microscopic picture that resembles a Ewings Sarcoma:

All the following conditions can lead to chondrocalcinosis EXCEPT:

Which of the following conditions leads to overgrowth of the epiphysis around a joint:

A deficiency of homogentesic acid oxidase has been associated with which of the conditions, leading to joint involvement:

A synovial arthropathy caused by an antigen-antibody reaction, or a state of hypersensitivity, resulting in an inflammatory process. Thus producing an antibody in the lymph nodes leading to an antigen antibody reaction in joints, is known as:

A condition which is most often associated with sacroiliatis is:

The lesions shown in the x-ray below, are typical of which of the following conditions:

Which, other condition shows widening of the intercondylar notch of the knee, besides hemophilia?

An arthritidis known to occur in children and involve multiple organs, with systemic manifestations including fever and multiple lymphadenopathy, would be:

The organism, that is most commonly found in septic arthritis, in the young sexually active individual, would be:

The organism that results in Lyme’s disease is:

On pathologic examination of the synovium of the knee joint , one notices: slender, long, needle like, and negatively birefringent structures. This is indicative of which of the following conditions:

Gouty arthritis of the first metatarsophalangeal joint of the foot is known as: