CTICasesInfluenza A mimicking COVID-19
Imaging findings
CT chest shows bilateral, peripheral ground-glass nodules distributed along the bronchovascular bundles in a young female presenting with fever, cough, and myalgias. Nasopharyngeal swab was PCR positive for Influenza A.
Key takeaways
Influenza A can present with bilateral, peripheral ground-glass nodules and organizing pneumonia on CT, which is radiographically indistinguishable from early-stage COVID-19. PCR testing is essential to differentiate influenza from SARS-CoV-2, especially during co-circulating seasons.
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