Kerley B lines are a radiological sign seen on chest X-rays (CXR) that indicate interstitial lung disease. They are named after Peter Kerley, a British radiologist who first described them in 1933.
Kerley B Lines on Chest X-Ray: A Comprehensive Diagnostic Guide cxr kerley b lines
On a CXR, Kerley B lines are characterized by: Kerley B lines are a radiological sign seen
The lung consists of the airspace (alveoli) and the interstitium (the supporting tissue). The interstitium contains the pulmonary lymphatic system, which is responsible for draining excess fluid from the lung tissues back into the central circulation. | Abuts the pleura; specific location (bases)
Fluid overload or increased capillary permeability can also cause these lines. Examples include:
| Finding | Appearance | Differentiating Feature | | :--- | :--- | :--- | | | Short, horizontal, peripheral. | Abuts the pleura; specific location (bases). | | Pulmonary Vessels | Branching, tapering. | Do not abut the pleura; usually central. | | Skin Folds | Thick, dark lines. | Often extend outside the lung field; artifacts of positioning. | | Subsegmental Atelectasis | Linear, often horizontal. | Often associated with volume loss; may shift fissures. | | Pleural Thickening | Broad, continuous. | Follows the rib contour; often blunts the costophrenic angle. |