Objective:To explore the chest CT imaging features of Chlamydia psittaci(C.psitta-ci)pneumonia.Methods:A retrospective analysis was performed on the clinical and chest CT data of 22 patients with C.psittaci pneumonia,analyzing the imaging characteristics of pulmonary lesions and extrapulmonary manifestations.Results:Among the 22 cases of C.psittaci pneumonia,the intrapulmo-nary lesions showed a lobar pneumonia pattern in 15 cases,a patchy nodular pattern in 5 cases,and a bronchopneumonia pattern in 2 cases.All cases exhibited air bronchogram sign,and common accompa-nying signs included thickening of interlobular septa(12 cases),intralobular reticular pattern(11 ca-ses),crazy paving sign(6 cases),halo sign(3 cases),reverse halo sign(1 case),centrilobular nodule(1 case),thickening of bronchial walls(2 cases),and tractive bronchiectasis(1 case).No necrosis or cavitation was observed in any of the lesions.Pulmonary lesions were distributed in 19 cases in a single lung and 3 cases in both lungs.Six cases involved the upper lung region,13 cases involved the lower lung region,and 3 cases involved both regions simultaneously.Twelve cases had peripheral distribu-tion,4 cases had peribronchovascular distribution,and 6 cases had diffuse distribution.Ten cases had associated pleural effusion,and 3 cases had enlarged mediastinal lymph nodes.Conclusion:The imaging manifestations of C.psittaci pneumonia most commonly characterized by a lobar pneumonia pattern,often accompanied by ground-glass opacities.Interstitial involvement is also common,with thickening of interlobular septa,intralobular reticular pattern,and crazy paving sign.Pleural effusion and medias-tinal lymphadenopathy may also be observed.
维普
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