Radiographic mimics of pneumonia. Pulmonary disorders to consider in differential diagnosis.

Pinpointing the source of roentgenographic lung abnormalities can be challenging because many noninfectious pulmonary disorders mimic pneumonia. The authors of this article discuss the most common radiographic presentations of lung disorders that may be mistaken for pneumonia, including focal and diffuse infiltrates, nodules, cavities, and pleural effusion. They also outline the role of thorough history taking and examination in prompt and accurate diagnosis of pulmonary disorders.