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AJR 2000; 174:1765-1768
© American Roentgen Ray Society

Original Report

Usefulness of the Double-Wall Sign in Detecting Pneumothorax in Patients with Giant Bullous Emphysema

Gayle M. Waitches1, Eric J. Stern and Theodore J. Dubinsky

1 All authors: Department of Radiology, Harborview Medical Center, University of Washington, Box 359728, 325 Ninth Ave., Seattle, WA 98104.

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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