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COVID-19 is an infectious disease caused by the novel SARS-CoV-2 coronavirus that in the majority of patients will only cause mild symptoms. The most common serious complication is COVID-19 pneumonia, however, gastrointestinal (GI) COVID- 19 is also a frequent presentation and likely due to the high expression of the ACE2 receptor in the GI tract. As diagnostic ultrasound has been frequently used in the management of this patient cohort, we conducted a literature search with the aim to present and review the currently published evidence of using ultrasound examinations in the management of intraabdominal manifestations of COVID-19. Our analysis showed that sonographic abnormalities of the hepatobiliary system are the most commonly reported findings in adults, while gastrointestinal abnormalities are the most common findings in children. The most severe complications are related to thromboembolic complications in the intensive care unit. [ABSTRACT FROM AUTHOR]

It is important to be familiar with the typical imaging features of the uncommon or even extremely rare focal liver lesions (FLL). Current guidelines of the World Federation for Ultrasound in Medicine and Biology (WFUMB) is aimed at assessing the usefulness of contrast enhanced ultrasound (CEUS) in the management of various FLL. In this review, we aim to summarize the ultrasound and CEUS characteristics with literature review of some extremely rare benign FLL, which might be helpful for improving diagnostic efficiency clinically. [ABSTRACT FROM AUTHOR]

Improved detection and characterization of common focal liver lesions (FLL) are the main topics of the World Federation for Ultrasound in Medicine and Biology (WFUMB) guidelines on the use of contrast-enhanced ultrasound (CEUS). On state-of-the-art CEUS imaging, to create a library of rare FLL, especially concerning their atypical imaging characteristics, might be helpful for improving clinical diagnostic efficiency. In this review, we aim to summarize the ultrasound and CEUS features of rare benign FLL. Currently there are limited reports and images published. [ABSTRACT FROM AUTHOR]