“…First, their specificity is suboptimal: in addition to pulmonary congestion/ARDS, B-lines are visible in: heart failure, nephrotic syndrome, pneumonia, minimal pleural effusion, hydropneumothorax, fibrosis, emphysema, exacerbations of chronic obstructive pulmonary diseases, and lymphangitis ( 4 – 6 ). Few B-lines are observable even in a healthy lung, typically in the dependent regions, and in the post-pneumonectomy space ( 7 ).…”