Kerley D Lines Official

Kerley B lines are short, horizontal lines at the lung periphery, typically seen at the costophrenic angles on a chest X-ray. They are a type of interstitial lung marking that represents interstitial edema or fibrosis. These lines are usually 1-2 mm in length and are perpendicular to the pleural surface.

The RCS is a normal lucent (dark) area seen on a lateral chest film, positioned immediately behind the sternum and directly in front of the ascending aorta and heart shadow. kerley d lines

In a normal patient, this space is radiolucent because it is occupied by thin, well-aerated anterior margins of the upper and middle lung lobes. Kerley B lines are short, horizontal lines at

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) . The RCS is a normal lucent (dark) area