Bilateral massive pneumonia caused by human metapneumovirus mimicking Mycoplasma pneumoniae pneumonia

Human metapneumovirus can be detected in adult community-acquired pneumonia. The chest image in this case was too massive to suspect human metapneumovirus pneumonia and clinically indistinguishable from Mycoplasma pneumoniae pneumonia. This case illustrates the difficulty of diagnostic imaging and importance of molecular diagnosis to avoid inappropriate use of antibiotics.