Imaging Manifestations of Influenza Pneumonia

Osnat Moreh-Rahav 1,2,3 Tatiana Brusgol 1,3 Oren Fruchter MD FCCP 1,3
1Radiology department and Pulmonary Division, E. Wolfson Medical Center, Israel
2Radiology department, Rabin Medical Center, Israel
3Imaging, Tel Aviv University, Israel

PURPOSE: To explore the radiological manifestations of influenza pneumonia during the outbreak of 2017.

MATERIALS AND METHODS: The radiological features of patients who presented to Wolfson Medical Center between December 2017 and March 2018 with serological confirmation of Influenza A or B were reviewed. Typical imaging characteristics were explored on Chest Radiography and/or Computed Tomography.

RESULTS: Our cohort included 39 patients, 14 patients (35.9%) with Influenza A, and 25 patients (64.1%) with Influenza B. The mean age of the entire cohort was 64 years. The male/female number was 13 and 26 . There were no significant differences between Influenza A and B with regard to imaging features. There were 5 patients with Influenza A H1N1 for whom the imaging findings were similar to other sub groups. There were 4 main imaging patterns : a normal study with no imaging pattern related to infection was the most common pattern (20/39 ), the second most common pattern was the airway centric disease pattern (10/39 ). A multifocal pneumonia pattern was less common (5/39), and least common was a single focal region of infection (4/39).

CONCLUSION: The Imaging manifestations of influenza pneumonia are nonspecific with regard to the different viral subtypes. There are 4 major imaging patterns, The most common is a normal study and when imaging findings are present the airway centric pattern is most common

Osnat Moreh-Rahav
Osnat Moreh-Rahav