E-ISSN: 1305-3612
Chest radiography and CT findings in patients with the 2009 pandemic (H1N1) influenza
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Chest Imaging - Original Article
VOLUME: 17 ISSUE: 3
P: 216-222
September 2011

Chest radiography and CT findings in patients with the 2009 pandemic (H1N1) influenza

Diagn Interv Radiol 2011;17(3):216-222
DOI: 10.4261/1305-3825.DIR.3337-10.1
Elif Karadeli 1
Zafer Koç 2
Şerife Ulusan 2
Gürcan Erbay 3
Yusuf Ziya Demiroğlu 4
Nazan Şen 5
1. Departments of Radiology, Başkent University School of Medicine, Konya, Turkey
2. Department of Radiology, Başkent University School of Medicine, Adana, Turkey
3. Department of Radiology, Başkent University Faculty of Medicine, Adana Teaching and Medical Research Center, Adana, Turkey
4. Department of Infectious Diseases and Clinical Microbiology, Başkent University Faculty of Medicine, Adana Teaching and Medical Research Center, Adana, Turkey
5. Department of Chest Diseases, Başkent University Faculty of Medicine, Adana Teaching and Medical Research Center, Adana, Turkey
No information available.
No information available
Received Date: 02.02.2010
Accepted Date: 06.07.2010
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ABSTRACT

PURPOSE

To present chest radiography and thoracic computed tomography (CT) findings for patients with pandemic influenza A (H1N1) from November–December 2009 and to explore any differences compared to previously reported imaging findings.

MATERIALS AND METHODS

Fifty-two hospitalized patients with pandemic influenza (H1N1) were included in the study. All of the patients underwent chest radiography, and 28 patients were also evaluated by thoracic CT. Group 1 comprised 24 (46%) patients with no identified risk factors for H1N1 influenza infection. Group 2 comprised the remaining 28 (54%) patients with identified risk factors. The distribution of lung involvement, consolidation, ground-glass opacity (GGO), lymph nodes, and pleural effusion were evaluated.

RESULTS

Abnormal findings were observed in 85% of the patients. Bilateral lung involvement was present in 80% of the patients. The most common finding was a mixture of GGO and air-space consolidation. Lower zone predominance occurred in 89% of group 1 and 85% of group 2 patients. The involvement was observed most frequently in the peripheral and central perihilar areas of the lung in 80% of the patients. The extent of disease was greater in group 2 patients with the involvement of three or more lung zones in 62% of the patients.

CONCLUSION

The most common imaging finding for lung involvement was a mixture of air-space consolidation and GGO with a patchy pattern and lower/middle zone predominance. Pulmonary involvement of the disease was more extensive than that described in previous reports.