Single, unilateral halo sign in COVID-19 pneumonia

Abstract

Highlights Radiologists should know the atypical CT findings of COVID-19 pneumonia as well as the typical ones A single focal halo-sign lesion has never been described before as manifestation of COVID-19 pneumonia CT halo-sign could represent a consequence of thrombotic damage of pulmonary microcirculation In the setting of asymptomatic patients, unilateral single halo-sign should alert to the possibility of COVID-19 pneumonia

Automated diagnosis of COVID-19 using radiological modalities and Artificial Intelligence functionalities: A retrospective study based on chest HRCT database

“…A halo sign is a rounded consolidation surrounded by ground-glass [ Fig. 2 (e)] [37] . Moreover, vascular dilatation (widening of the vessels), fibrosis, traction bronchiectasis, subpleural bands, and architectural distortion are some less common findings mainly seen during the later progression of the infection or the post-COVID phase.…”