The "bullseye" sign has been exclusively reported in patients suffering from coronavirus disease 2019 (COVID-19) pneumonia. It is theorized that this newly recognized computed tomography (CT) feature represents a sign of organizing pneumonia. Well established signs of organizing pneumonia also reported in COVID-19 patients include linear opacities, the "reversed halo" sign (or "atoll" sign), and a perilobular distribution of abnormalities. These findings are usually present on imaging in the intermediate and late stage of the disease. This is a case of simultaneous presence of the "bullseye" and the "reversed halo" sign on chest CT images of a COVID-19 patient examined 22 days after symptom onset.
Keywords: Bullseye; COVID-19; COVID-19, coronavirus disease 2019; CT; GGO, ground glass opacity; Organizing pneumonia; Pneumonia; RT-PCR, reverse transcription polymerase chain reaction; Reversed halo; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.
© 2021 The Authors. Published by Elsevier Inc. on behalf of University of Washington.