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High-Resolution CT Findings of Re-Expansion Pulmonary Edema

  • Baik, Jun-Hyun (Department of Radiology, St. Vincent's Hospital, The Catholic University of Korea) ;
  • Ahn, Myeong-Im (Department of Radiology, Seoul St. Mary's Hospital, The Catholic University of Korea) ;
  • Park, Young-Ha (Department of Radiology, St. Vincent's Hospital, The Catholic University of Korea) ;
  • Park, Seog-Hee (Department of Radiology, Seoul St. Mary's Hospital, The Catholic University of Korea)
  • Received : 2009.11.27
  • Accepted : 2009.12.10
  • Published : 2010.04.01

Abstract

Objective: To describe the high-resolution CT (HRCT) findings of re-expansion pulmonary edema (REPE) following a thoracentesis for a spontaneous pneumothorax. Materials and Methods: HRCT scans from 43 patients who developed REPE immediately after a thoracentesis for treatment of pneumothorax were retrospectively analyzed. The study group consisted of 41 men and two women with a mean age of 34 years. The average time interval between insertion of the drainage tube and HRCT was 8.5 hours (range, 1-24 hours). The patterns and distribution of the lung lesions were analyzed and were assigned one of the following classifications: consolidation, ground-glass opacity (GGO), intralobular interstitial thickening, interlobular septal thickening, thickening of bronchovascular bundles, and nodules. The presence of pleural effusion and contralateral lung involvement was also assessed. Results: Patchy areas of GGO were observed in all 43 patients examined. Consolidation was noted in 22 patients (51%). The geographic distribution of GGO and consolidation was noted in 25 patients (58%). Interlobular septal thickening and intralobular interstitial thickening was noted in 28 patients (65%), respectively. Bronchovascular bundle thickening was seen in 13 patients (30%), whereas ill-defined centrilobular GGO nodules were observed in five patients (12%). The lesions were predominantly peripheral in 38 patients (88%). Of these lesions, gravity-dependent distribution was noted in 23 cases (53%). Bilateral lung involvement was noted in four patients (9%), and a small amount of pleural effusion was seen in seven patients (16%). Conclusion: The HRCT findings of REPE were peripheral patchy areas of GGO that were frequently combined with consolidation as well as interlobular septal and intralobular interstitial thickening.

Keywords

References

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