Kerley's B Lines 〈Authentic〉

are a crucial radiological sign identified on chest X-rays, serving as a primary indicator of interstitial pulmonary edema. These short, horizontal lines occur when the interlobular septa—the connective tissue layers separating lung lobules—become thickened by fluid, cells, or fibrosis. Characteristics and Identification

The septa swell. And suddenly, on a plain chest X-ray, Kerley’s B lines appear.

By mastering the interpretation of Kerley's B lines, clinicians can improve their diagnostic skills and provide better patient care. kerley's b lines

On a standard PA chest X-ray, look first at the —the sharp corners where diaphragm meets ribs. Normally, these are clear. If you see fine, horizontal lines there, running to the lateral chest wall, you’ve found Kerley’s B lines.

Named after the Irish radiologist Dr. Peter Kerley (1900–1979), these lines were first described in the 1930s. Kerley, working at the National Heart Hospital in London, noticed them in patients with mitral stenosis. He classified three types (A, B, C), but B lines became the star—easily spotted and clinically useful. are a crucial radiological sign identified on chest

They represent thickened subpleural interlobular septa. Causes and Clinical Significance

B lines remain the most clinically useful because they are discrete, easy to name, and hard to fake. And suddenly, on a plain chest X-ray, Kerley’s

Chronic narrowing of the mitral valve often results in permanent Kerley lines due to long-standing pulmonary hypertension.