Winged scapula in the emergency department: a case report and review.

Winged scapula is a well-described condition associated with a wide variety of injuries and conditions. It is typically due to dysfunction of the serratus anterior or trapezius muscles, often secondary to long thoracic or accessory nerve palsies. Given the potential for permanent disability, winged scapula is an important diagnosis to consider in any patient presenting with shoulder pain or weakness.