Abstract
In cases of severe acute respiratory syndrome (SARS) caused by COVID-19, a broad spectrum of pulmonary sequelae can be observed.1 Some preliminary reports described radiological and histological findings suggestive of pneumonitis and organizing pneumonia (OP),2-4 two diffuse interstitial lung diseases (DILD) that can lead to pulmonary fibrosis (PF). However, only one report describes the long-term radiological evolution of pulmonary sequelae of COVID-19.5 Similarly, follow-up studies after middle eastern respiratory syndrome-CoV and SARS-CoV described a prevalence of residual PF between 33% and 62%,6,7 although the diagnosis of PF was never histologically confirmed.
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