Surgical Anatomy & Approaches MCQs

During an ilioinguinal approach for an acetabular fracture, severe bleeding may be encountered from the 'corona mortis'. This anomalous vessel typically lies on the posterior aspect of the superior pubic ramus and represents an anastomosis between the:

An anterolateral surgical approach to the distal tibia and ankle joint is performed for a pilon fracture. During superficial dissection, which sensory nerve is at greatest risk of iatrogenic injury as it crosses the operative field?

During the ilioinguinal approach to the acetabulum, the surgeon must be cautious of the 'corona mortis'. This vascular structure represents an anastomosis between which two vascular systems?

The anterior (Smith-Petersen) approach to the hip relies on a true internervous plane. Which of the following accurately describes the muscular interval and the respective innervation of this plane?

The gluteus maximus is the primary extensor of the hip joint. What is its motor innervation and the corresponding primary spinal nerve roots?

The radial nerve descends in the posterior compartment of the arm within the spiral groove. At what approximate distance proximal to the lateral epicondyle does the radial nerve typically pierce the lateral intermuscular septum to enter the anterior compartment?

In the deltopectoral approach to the shoulder, the cephalic vein is typically identified and retracted laterally to preserve its primary venous drainage. Between which two muscles does this vein travel, and what is their respective innervation?

During an ilioinguinal approach for an anterior column acetabular fracture, significant hemorrhage occurs while dissecting near the superior pubic ramus. This bleeding is most likely from an anastomosis between which two vascular systems?

The Kocher approach to the radial head utilizes a true internervous plane. Which two muscles define this plane, and what are their respective innervations?

In an anterolateral approach to the distal third of the humerus, the brachialis muscle is typically split longitudinally. Why is this considered an anatomically safe maneuver?

When performing an anterolateral approach to the distal tibia and ankle joint, the internervous plane lies between the extensor digitorum longus (EDL) and the peroneus tertius. Which sensory nerve branch routinely crosses this field and must be protected?

During a Kocher-Langenbeck approach to the acetabulum, the short external rotators are detached. Preserving the obturator externus tendon serves primarily to protect which vital structure?

The Smith-Petersen approach to the hip utilizes the internervous plane between the sartorius and the tensor fasciae latae (TFL). Which structure lies within the proximal portion of this interval and must be protected during superficial dissection?

The posterior approach to the shoulder uses an internervous plane between the infraspinatus and teres minor. Which two nerves supply these muscles, respectively?

During the anterior ilioinguinal approach to the pelvis for an acetabular fracture, life-threatening hemorrhage is encountered from a vascular anastomosis crossing over the superior pubic ramus. This vessel represents a communication between which two vascular systems?

During an anterior (ilioinguinal) approach for fixation of an acetabular fracture, life-threatening hemorrhage occurs while dissecting over the superior pubic ramus. This bleeding is most likely due to an unrecognized anastomosis between which two vascular systems?

A 5-year-old boy presents with an extension-type supracondylar humerus fracture. Radiographs show posterolateral displacement of the distal fragment. Based on this displacement pattern, which nerve is at the highest risk of injury?