Kerley B Lines On Cxr [portable] Jun 2026

The identification of Kerley B lines often serves as an early warning sign in clinical practice.

The "lines" are actually the radiographic representation of —the connective tissue planes that separate secondary lung lobules. In a healthy lung, these septa are too thin to be visible on X-ray. They become visible only when they are thickened by: Fluid: Edema from heart failure or renal insufficiency. Cells: Infiltration by malignant cells (cancer). kerley b lines on cxr

Kerley B lines are short, horizontal, peripheral lines on a chest X-ray that represent thickened interlobular septa. While they are the hallmark radiographic sign of cardiogenic pulmonary edema, they can also result from malignant infiltration or fibrosis. Their presence allows clinicians to identify interstitial fluid accumulation early, facilitating timely intervention for underlying cardiac dysfunction. The identification of Kerley B lines often serves

Normally, interlobular septa are too thin to be seen on CXR. However, when fluid accumulates in the interstitial space, the septa become thickened and opaque. They become visible only when they are thickened