2. Trauma MCQs

During a four-compartment fasciotomy for acute compartment syndrome of the lower leg, the deep posterior compartment must be completely decompressed. Which of the following muscles is contained within this compartment?

A 45-year-old male presents with weakness in thumb extension and index finger extension following a radial head fracture. Sensation in the first web space is normal. Compression of the involved nerve most commonly occurs at which of the following structures?

The proximal pole of the scaphoid is notoriously susceptible to avascular necrosis following fracture. The major blood supply to the proximal pole enters the scaphoid at which anatomical location?

A 35-year-old male sustains a midshaft clavicle fracture. During open reduction and internal fixation, the surgeon must be mindful of the underlying neurovascular structures. Which of the following structures is most closely applied to the posterior-inferior aspect of the middle third of the clavicle?

During a posterolateral approach to the ankle for fixation of a posterior malleolus fracture, the sural nerve must be protected. The sural nerve typically courses in close proximity to which structure in the distal leg?

When placing iliosacral screws for pelvic ring injuries, the surgeon must remain within the osseous safe zone of the sacral ala. The anterior limit of this safe zone in S1 is defined by the risk of injury to which structure?

A 25-year-old male develops acute compartment syndrome of the deep posterior compartment of the leg after a tibial fracture. Which of the following neurovascular structures is contained within this compartment?

During a medial subvastus approach to the distal femur, the adductor canal (Hunter's canal) is visualized. Which of the following nerves runs within the adductor canal?

Figure 19 highlights an arthroscopic view of a meniscus.

Which of the following describes a key anatomical difference between the medial and lateral menisci?

An anterolateral approach to the distal tibia is used for pilon fracture fixation. The superficial peroneal nerve is at risk in this exposure. Where does this nerve predictably pierce the deep fascia to become subcutaneous?

A 6-year-old child presents with a painless snapping knee. MRI demonstrates a lateral meniscus covering the entire tibial plateau. Arthroscopy reveals hypermobility of the posterior horn with an absent coronary ligament. Which discoid meniscus variant is this?

Radiographs of a 19-year-old skier's acutely injured knee show a Segond fracture. This pathognomonic avulsion fracture of the anterolateral proximal tibia is highly associated with an anterior cruciate ligament (ACL) tear. Which specific structure avulses to cause this fracture?

A 35-year-old laborer falls directly on the lateral aspect of his shoulder and is diagnosed with a grade III acromioclavicular (AC) joint separation. Which ligaments are completely disrupted in this injury?

A 29-year-old cyclist falls directly onto his shoulder point. Radiographs confirm a 150% superior displacement of the distal clavicle relative to the acromion, and the coracoclavicular distance is increased by 150% compared to the contralateral side. This represents which type of acromioclavicular (AC) joint injury according to the Rockwood classification?

A 32-year-old manual laborer falls directly onto the tip of his shoulder. Radiographs demonstrate a 100% superior displacement of the distal clavicle relative to the acromion, with the coracoclavicular distance increased by 50% compared to the uninjured side. The most appropriate initial management is:

A 25-year-old cyclist sustains a direct blow to the point of his shoulder. Radiographs demonstrate a Type V acromioclavicular (AC) joint injury. Which of the following correctly describes the fascial disruption distinguishing a Type V from a Type III AC joint injury?

A 26-year-old cyclist falls directly onto his right shoulder. Radiographs show superior displacement of the clavicle relative to the acromion, with an 80% increase in the coracoclavicular distance compared to the uninjured side. The deltotrapezial fascia remains structurally intact. This represents which Rockwood classification of acromioclavicular (AC) joint separation?

A 42-year-old heavy laborer sustains an acromioclavicular (AC) joint injury. Radiographs reveal a 150% superior displacement of the clavicle relative to the acromion with significant posterior displacement into the trapezius fascia. Based on the Rockwood classification, what is the injury type and optimal management?

A 24-year-old football player sustains an external rotation injury to his right ankle. Radiographs demonstrate a widened medial clear space and decreased tibiofibular overlap. In a syndesmotic injury, which ligament serves as the primary restraint to anterior translation of the distal fibula?

A 28-year-old male falls directly onto the point of his shoulder while cycling. Radiographs demonstrate a Type III acromioclavicular (AC) joint separation. Based on the Rockwood classification, what is the status of the supporting ligaments?