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  • Title: Usefulness of the double-wall sign in detecting pneumothorax in patients with giant bullous emphysema.
    Author: Waitches GM, Stern EJ, Dubinsky TJ.
    Journal: AJR Am J Roentgenol; 2000 Jun; 174(6):1765-8. PubMed ID: 10845520.
    Abstract:
    OBJECTIVE: We describe a new sign improving detection of pneumothorax in patients with giant bullous emphysema: air surrounding both sides of the bulla wall (the intrathoracic equivalent of the double-wall sign of pneumoperitoneum). We report the radiographic and CT appearances of the double-wall sign in seven patients with giant bullous emphysema, four of whom had pneumothorax. CONCLUSION: Recognizing the double-wall sign of pneumothorax should aid in the triage of patients with giant bullous emphysema.
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