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Changes of chest X ray finding in subcutaneous emphysema after vacuum-assisted closure (VAC) therapy (arrow shows the VAC connection tube). (A) Initial massive subcutaneous emphysema before VAC therapy. (B) Decreased subcutaneous emphysema after 24 hours of VAC therapy. (C) After 72 hours after VAC therapy, subcutaneous emphysema was much more improved. AP, anterior-posterior.
