输入性新型冠状病毒肺炎临床和CT特征

目的 分析输入性新型冠状病毒肺炎（COVID-19）的临床和CT表现特点。方法 回顾性分析12例输入性COVID-19患者的临床及CT资料。结果 12例均有流行病学史，均发热，8例咳嗽；9例白细胞计数正常，7例淋巴细胞计数减少，5例C反应蛋白升高。CT显示双肺受累10例，单肺受累2例。2例病变局限于1个肺叶，3例累及2个肺叶，2例3个肺叶，5例累及双侧全肺；12例病变均主要在两肺外周胸膜下分布，2例呈单纯磨玻璃影（GGO），6例GGO伴实性成分、4例伴实变。病变形态为斑片影10例，类圆形2例。6例可见空气支气管征，4例见小叶间隔增粗，3例见纤维灶。12例均未见胸腔积液和淋巴结肿大。结论 COVID-19患者多有流行病学史，主要症状为发热、咳嗽，实验室检查白细胞计数多正常、粒细胞计数减低；CT多见两下肺外周多发GGO病变。

Clinical presentations and CT features of imported corona virus disease 2019

Objective To observe clinical presentations and CT features of imported corona virus disease 2019 (COVID-19). Methods Clinical and CT data of 12 patients with imported COVID-19 were retrospectively analyzed. Results All 12 patients had epidemiological history. The most common symptoms were fever (n=12) and cough (n=8). Nine patients had normal white blood cell counts, 7 patients had decreased lymphocyte counts and 5 had elevated C-reactive protein. The lesions involved both lungs in 10 cases, while involved single lung in 2 cases, limited to 1 lobe in 2 cases, 2 lobes in 3 cases, 3 lobes in 2 cases, while involved both whole lungs in 5 cases. The lesions were mainly distributed in the peripheral zone under the pleura in all 12 cases, presented as pure ground-glass nodules (GGO) in 2 cases, GGO with solid components in 6 cases, GGO with solid nodules in 4 cases. The morphology of lesions included patch shadow in 10 cases and circular shape in 2 cases. Air bronchus signs were observed in 6 cases, thickened leaflet septa were found in 4 cases and fibrous foci were noticed in 3 cases. Neither pleural effusion nor lymphadenopathy was seen in any of these 12 patients. Conclusion Most COVID-19 patients have epidemiology histories. The main symptoms of COVID-19 patients are fever and cough, whose laboratory tests showing normal white blood cell counts and reduced granulocyte counts, while CT depicting multiple peripheral GGO lesions of the lungs.