Organizing pneumonia associated with Mycoplasma pneumoniae infection.

Mycoplasma pneumoniae infection is known to produce infiltrative and/or nodular opacities that are often localized. A patient presented to us with diffuse centrilobular, peribronchovascular, and perilobular opacities after documented Mycoplasma pneumoniae infection. A surgical biopsy proved the lung disease to be organizing pneumonia, which dramatically resolved in response to treatment with corticosteroid. This case represents an unusual radiological manifestation associated with M. pneumoniae infection, thereby stressing the importance of this disease in the differential diagnosis for patients with diffuse opacities of the lungs.