CT features and clinical manifestations of ordinary pneumonia with COVID-19 infection: A multi-center study
Abstract Purpose: Investigate clinical and CT manifestations of ordinary coronavirus disease (COVID-19) pneumonia.Materials and methods: Patients with ordinary COVID-19 pneumonia (confirmed by RT-PCR) and performed initial chest CT were retrospectively enrolled. Fifty-eight patients were assigned to group 1 (<50 years, n=33) and group 2 (50≥years, n=25) on the basis of age. The clinical data, laboratory results, and imaging findings were evaluated. Imaging features were analyzed and compared across the two groups.Results: On chest CT imaging, 44 (75.9%) patients showed bilateral lung involvement, 14(24.1%) showed unilateral lung involvement, with predominant peripheral distribution (26/58, 44.8%) and mixed distribution (30/58, 51.7%). 445(445/634, 70.2%) lesions occurred in the lung periphery, 189 (29.8%) in the center. There were more lobes involved in group 2(median 4, IQR 3-5) than group 1(median 3, IQR 1.5-4) (P=0.024). Ground glass opacity (GGO) (451/634, 71.1%) and consolidation (157/634, 24.8%) were the main CT findings. Lesions with a maximum diameter greater than 5cm were more common in group 2 (19/25, 76%) than group 1 (12/33, 36.4%) (P=0.003). The CT score of bilateral lungs, right lung, left lung and each lobe in group 2 was significantly higher than those of group 1 (all P < 0.05), except for the middle lobe of the right lung (P=0.979). Conclusions: Ordinary COVID-19 pneumonia on chest CT generally manifested as multiple GGO and consolidation in the bilateral lung, with predominant peripheral or mixed distribution. Older age might be a risk factor for progression in ordinary COVID-19 pneumonia.