The Many Faces of COVID-19: Spectrum of Imaging Manifestations
2020; Radiological Society of North America; Volume: 2; Issue: 1 Linguagem: Inglês
10.1148/ryct.2020200037
ISSN2638-6135
AutoresFernando Uliana Kay, Suhny Abbara,
Tópico(s)SARS-CoV-2 and COVID-19 Research
ResumoHomeRadiology: Cardiothoracic ImagingVol. 2, No. 1 Next EditorialFree AccessPulmonary ImagingThe Many Faces of COVID-19: Spectrum of Imaging ManifestationsFernando U. Kay , Suhny AbbaraFernando U. Kay , Suhny AbbaraAuthor AffiliationsFrom the Department of Radiology, UT Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX 75390-9316.Address correspondence to F.U.K. (e-mail: [email protected]).Fernando U. Kay Suhny AbbaraPublished Online:Feb 14 2020https://doi.org/10.1148/ryct.2020200037See related articleMoreSectionsPDF ToolsAdd to favoritesCiteTrack Citations ShareShare onFacebookXLinked In See also the article by Kuo et al in this issue.On January 30, 2020, the International Health Regulations Emergency Committee concluded that the outbreak of coronavirus disease 2019 (COVID-19, formerly 2019-nCoV) acute respiratory disease reached the status of a Public Health Emergency of International Concern (1).The events that culminated in this global health care crisis had a modest origin in a fish and wild animal market commercializing live animals as poultry, bats, marmots, and snakes in the city of Wuhan, China (2).At the time of the writing of this article, the death toll from COVID-19 is at 1368 individuals and has surpassed that from the 2003 severe acute respiratory syndrome outbreak. Today there are 46 550 confirmed cases of COVID-19, 447 of which are in 24 countries outside of China. Only one death has occurred so far outside of China according to Situation Report 21 from the World Health Organization (3). In the United States, The Centers for Disease Control and Prevention has been monitoring this outbreak, and numbers published on February 7, 2020 reveal 443 individuals under investigation across 42 states and territories since January 21, 2020, with 15 confirmed cases (4).The spotlight of this Radiology: Cardiothoracic Imaging issue exposes the wider spectrum of radiologic manifestations of the COVID-19 acute respiratory disease that can be encountered on images of the chest. In this issue, Ng et al (5) examine the clinical and radiologic presentation of 21 patients with confirmed COVID-19 from Chinese centers in Shenzhen and Hong Kong. They also put their findings into perspective and compare with imaging studies from other Chinese centers obtained by a systematic review of the emerging literature (6–9). The article demonstrates the spectrum of radiologic presentations of the outbreak and illustrates the growing role of CT in evaluation of patients with COVID-19 when compared with past coronavirus outbreak. The most common findings expected on chest imaging are ground-glass opacities or consolidation in a multilobar and peripheral distribution (5).However, despite the continuous crystallization of this general picture of COVID-19, the granular analysis reveals a plethora of imaging manifestations, which is perhaps more diverse than anticipated. This is reflected in the large number of case reports with very interesting aspects recently submitted to this journal. For example, Kong and Agarwal (10) report a series of three unrelated cases of COVID-19 pneumonia presenting with a spectrum of findings on chest radiographs and CT images, varying from the commonly seen ground-glass opacities and consolidation, to patterns that include crazy paving and reversed halo, suggesting organizing pneumonia as the underlying mechanism of lung injury (11,12). In another report, Wu et al (13) show the temporal evolution on CT of a patient with COVID-19 infection, also presenting with radiologic findings resembling organizing pneumonia. It is noteworthy to mention that organizing pneumonia was described as the hallmark of another coronavirus infection outbreak occurring in 2012, with the center identified in Saudi Arabia, known as the Middle East respiratory syndrome coronavirus (MERS-CoV) (14).Viral pneumonias have been frequently associated with nodules on CT (15); however, the general picture of COVID-19 seems to exclude nodules as a frequent occurrence. An interesting report by Li et al (16) describes the case of a young woman with COVID-19 presenting with a single right upper lobe nodule with the halo sign. A review of the results published by Chung et al (8) reveals that rounded lung opacities can be present in up to 33% of the chest CT studies of symptomatic patients with COVID-19. Although it was initially thought to be associated with perilesional hemorrhage in angioinvasive fungal infections or hypervascular metastases (17), the halo sign can also be present in pneumonias caused by herpes simplex, varicella, cytomegalovirus, and Epstein-Barr viruses (15). Currently, the main pathologic drivers for each radiologic pattern (eg, ground glass, consolidation, nodules, halo sign, etc) are unknown. As the knowledge about the COVID-19 continues to advance, future studies will hopefully shed light on the histopathologic findings in this emerging viral infection, which in turn could result in better understanding of the various radiologic observations.As the outbreak continues to spread worldwide, attention has shifted toward determinants of clinical manifestation and disease severity. For example, in a thought-provoking report, Liu et al (18) illustrate the spectrum of severity within a familial cluster of husband, wife, and son infected with COVID-19, varying from a normal study (obtained after confirmed infection but prior to onset of fever), to subtle centrilobular nodules, and the more common picture with multifocal ground-glass opacities. On the other end of the spectrum, Qian et al (19) epitomize the unfortunate outcome of severe pneumonia attributed to COVID-19 in a worker at the Huanan seafood market during the dawn of the outbreak. This wide spectrum of disease severity is a conundrum that needs further investigation. Recent observational studies have shown that older men with comorbidities may present a risk group for the development and increased severity of the COVID-19 pneumonia (6,20). As the disease outbreak affects a larger population each day, it is crucial to develop strategies for protecting those at increased risk for worse clinical outcomes.New data about COVID-19 continue to emerge, and will, hopefully, facilitate the diagnostic and preventive measures for containing and minimizing the impact of this international public health emergency on public health. This focused issue of Radiology: Cardiothoracic Imaging seeks to raise awareness of this disease among the imaging community, illuminating the spectrum of disease under the microscope. As the picture becomes clearer, it is time for the scientific community to move to the next level, focusing efforts in elucidating the radiologic-pathologic correlation, determining potential imaging predictors of outcomes, and investigating the role of imaging for guidance of therapy.Disclosures of Conflicts of Interest: F.U.K. Activities related to the present article: disclosed no relevant relationships. Activities not related to the present article: employed by University of Texas Southwestern Medical Center as assistant professor. Other relationships: disclosed no relevant relationships. Activities related to the present article: editorial board member of Radiology: Cardiothoracic Imaging. S.A. Activities related to the present article: disclosed no relevant relationships. Activities not related to the present article: author is board member of SCCT (travel reimbursement to annual meeting; no remuneration BOD/EC member); institution receives NIH grants; author receives royalties from Elsevier as a textbook author. Other relationships: disclosed no relevant relationships. Activities related to the present article: Editor of Radiology: Cardiothoracic Imaging. References1. World Health Organization. Statement on the second meeting of the International Health Regulations (2005) Emergency Committee regarding the outbreak of novel coronavirus (2019-nCoV). https://www.who.int/news-room/detail/30-01-2020-statement-on-the-second-meeting-of-the-international-health-regulations-(2005)-emergency-committee-regarding-the-outbreak-of-novel-coronavirus-(2019-ncov). Published January 30, 2020. Accessed February 2020. Google Scholar2. Lu H, Stratton CW, Tang YW. Outbreak of pneumonia of unknown etiology in Wuhan China: the mystery and the miracle. J Med Virol 2020 Jan 16 [Epub ahead of print]. Crossref, Google Scholar3. World Health Organization. Novel Coronavirus(2019-nCoV) Situation Report – 21. https://www.who.int/docs/default-source/coronaviruse/situation-reports/20200210-sitrep-21-ncov.pdf?sfvrsn=947679ef_2. Published February 10, 2020. Accessed February 2020. Google Scholar4. Centers for Disease Control and Prevention. 2019 Novel Coronavirus (2019-nCoV) in the U.S. https://www.cdc.gov/coronavirus/2019-ncov/cases-in-us.html. Updated February 12, 2020. Accessed February 2020. Google Scholar5. Ng MY, Lee EYP, Yang J, et al. Imaging Profile of the COVID-2019 Infection: Radiologic Findings and Literature Review. Radiol Cardiothorac Imaging 2020;2(1):e200034. Link, Google Scholar6. Chen N, Zhou M, Dong X, et al. Epidemiological and clinical characteristics of 99 cases of 2019 novel coronavirus pneumonia in Wuhan, China: a descriptive study. Lancet 2020 Jan 30 [Epub ahead of print]. Crossref, Google Scholar7. 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