Kerley D Lines __top__ Jun 2026

Kerley lines are linear opacities seen on chest imaging, representing thickened interlobular septa due to fluid, cellular infiltration, or fibrosis. They are classified as:

are distinct linear or reticular opacities visible within the retrosternal clear space (RCS) exclusively on a lateral chest radiograph . Morphologically identical to the better-known, peripherally located Kerley B lines, they represent abnormal thickening of the interlobular septa in the anterior, retrosternal regions of the lungs. While Kerley lines are classically taught as a cornerstone sign of interstitial pulmonary edema secondary to congestive heart failure, modern thoracic radiology has re-established Kerley D lines as an invaluable, early diagnostic indicator for pulmonary fibrosis and interstitial lung disease (ILD) . kerley d lines

: They may be the first or only sign of interstitial lung disease visible on an otherwise normal-looking frontal X-ray. Kerley lines are linear opacities seen on chest

To successfully identify Kerley D lines, a radiologist must closely inspect the . While Kerley lines are classically taught as a

In standard radiology literature, there is no Kerley D classification . The term “Kerley D” is occasionally misused informally to refer to subpleural edema lines or thickened septa in atypical locations , but it is not a recognized subtype. This report will therefore focus on Kerley B lines as the most relevant finding.