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CT findings of COVID-19-associated pulmonary aspergillosis: a systematic review and individual patient data analysis

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CLINICAL IMAGING
卷 90, 期 -, 页码 11-18

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ELSEVIER SCIENCE INC
DOI: 10.1016/j.clinimag.2022.07.003

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COVID-19; Coronavirus 2019; Aspergillosis; Tomography; X-ray computed

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This study conducted a systematic review and individual patient-level image analysis of CT findings of COVID-19-associated pulmonary aspergillosis (CAPA), revealing that CAPA can frequently manifest as COVID-19 pneumonia without common CT abnormalities of pulmonary aspergillosis. If abnormalities exist on CT images, CAPA may frequently accompany bronchial abnormalities.
Purpose: Common CT abnormalities of pulmonary aspergillosis represent a cavity with air-meniscus sign, nodule, mass, and consolidation having an angio-invasive pattern. This study aims to conduct a systematic review and an individual patient-level image analysis of CT findings of COVID-19-associated pulmonary aspergillosis (CAPA).Methods: A systematic literature search was conducted to identify studies reporting CT findings of CAPA as of January 7, 2021. We summarized study-level clinical and CT findings of CAPA and collected individual patient CT images by inviting corresponding authors. The CT findings were categorized into four groups: group 1, typical appearance of COVID-19; group 2, indeterminate appearance of COVID-19; group 3, atypical for COVID-19 without cavities; and group 4, atypical for COVID-19 with cavities. In group 2, cases had only minor discrepant findings including solid nodules, isolated airspace consolidation with negligible ground-glass opaci-ties, centrilobular micronodules, bronchial abnormalities, and cavities. Results: The literature search identified 89 patients from 25 studies, and we collected CT images from 35 CAPA patients (mean age 62.4 +/- 14.6 years; 21 men): group 1, thirteen patients (37.1%); group 2, eight patients (22.9%); group 3, six patients (17.1%); and group 4, eight patients (22.9%). Eight of the 14 patients (57.1%) with an atypical appearance had bronchial abnormalities, whereas only one (7.1%) had an angio-invasive fungal pattern. In the study-level analysis, cavities were reported in 12 of 54 patients (22.2%).Conclusion: CAPA can frequently manifest as COVID-19 pneumonia without common CT abnormalities of pul-monary aspergillosis. If abnormalities exist on CT images, CAPA may frequently accompany bronchial abnormalities.

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