Prior to reading the article, we expected lung ultrasonography to be a specific, but poorly sensitive examination for the diagnosis of community-acquired pneumonia. The nonspecific nature of both B lines and lung consolidations render an echographic diagnosis of pneumonia complex. To make a firm diagnosis, more detailed characterization of B lines, consolidations, and other associated echographic features (eg, pleural line) must be taken into account. An example of this issue is the Bedside Lung Ultrasound in Emergency protocol’s echographic diagnostic criteria for pneumonia, which were used by Bataille et al in their article. One of these criteria states that all lung consolidations (C profile) are pneumonia. Applying this criterion, a patient with congestive heart failure presenting with bilateral pleural effusions and resulting atelectasis would be misdiagnosed as having pneumonia. The dynamic air bronchogram sign, which represents pus and air intermingled in a bronchus moving with a patient’s ventilation, allows differentiation between atelectasis and pneumonia with good specificity but poor sensitivity. Recognizing the problem of differentiating these two common causes of consolidation, others have studied the state of pulmonary hypoxic vasoconstriction using various Doppler indices with good discriminatory power. Finally, the differential diagnosis of lung consolidations also includes lung tumors, pulmonary infarcts, and lung contusions. Using more specific contemporary lung echographic criteria for the diagnosis of pneumonia might have influenced the results of Bataille et al.