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Background  Subcutaneous emphysema is an uncommon clinical finding associated both with benign sources and potentially deadly necrotizing infections. Wide ranges of causes exist including trauma, iatrogenic injuries, factitious disorders and necrotizing infections.    Case presentation  A 49-year old male presented to the emergency room with extensive subcutaneous emphysema following blunt trauma. The orthopaedic surgery service was consulted for treatment of suspected necrotizing fasciitis due to his subcutaneous emphysema. A careful patient history and physical examination correlated with laboratory and radiographic findings revealed rib fractures and a long-standing, undiagnosed pneumothorax as the cause for emphysema. Treatment of the underlying condition with chest tubes led to eventual resolution of the emphysema, though multisystem organ failure ultimately resulted in patient death.    Conclusion  This case illustrates the importance of rapidly and appropriately evaluating trauma patients, and in this case specifically diagnosing and treating the underlying cause of subcutaneous emphysema. The late diagnosis of pneumothorax resulted in delayed definitive treatment, which may have contributed to the patient’s ultimate demise. In acute and sub-acute trauma situations a high level of suspicion for life threatening injuries must be maintained. Decision making for initial treatment should be based on the basic tenants of Advanced Trauma Life Support to primarily address these injuries and help prevent further disability or death.

Misdiagnosed pneumothorax interpreted as necrotizing fasciitis of the chest wall: case report of a potentially preventable death