Which imaging views are used to evaluate a suspected shoulder dislocation and assess axillary nerve injury?

Which imaging views are used to evaluate a suspected shoulder dislocation and assess axillary nerve injury?

• A. AP view and lateral view
• B. Axillary and Y-view
• C. MRI with gadolinium
• D. CT scan without contrast

Answer: (B)

When evaluating a suspected shoulder dislocation, you want radiographs that clearly show where the humeral head sits in relation to the glenoid and whether there are fractures that might threaten nearby nerves. The axillary view provides an axial projection of the shoulder, letting you see the true relationship between the humeral head and the glenoid and to detect surgical-neck or glenoid rim fractures that could jeopardize the axillary nerve. The scapular Y view projects the scapula so the humeral head’s position relative to the coracoid and acromion is easy to interpret, making it especially helpful to determine the direction of dislocation (anterior versus posterior) when the AP view is unclear or can be misleading. These two views together give a reliable assessment of both dislocation and the risk to the axillary nerve, whereas relying on the AP view alone can miss dislocation direction and subtle fracture patterns. MRI or CT are usually reserved for more detailed soft-tissue evaluation or complex fractures, not initial imaging.

When evaluating a suspected shoulder dislocation, you want radiographs that clearly show where the humeral head sits in relation to the glenoid and whether there are fractures that might threaten nearby nerves. The axillary view provides an axial projection of the shoulder, letting you see the true relationship between the humeral head and the glenoid and to detect surgical-neck or glenoid rim fractures that could jeopardize the axillary nerve. The scapular Y view projects the scapula so the humeral head’s position relative to the coracoid and acromion is easy to interpret, making it especially helpful to determine the direction of dislocation (anterior versus posterior) when the AP view is unclear or can be misleading.

These two views together give a reliable assessment of both dislocation and the risk to the axillary nerve, whereas relying on the AP view alone can miss dislocation direction and subtle fracture patterns. MRI or CT are usually reserved for more detailed soft-tissue evaluation or complex fractures, not initial imaging.