Before Kerley’s work, radiologists could see large fluid accumulations in the lungs (like full-blown pulmonary edema or pneumonia), but subtle changes in the lung's infrastructure were invisible on X-rays. By the 1950s, improved X-ray technology allowed Kerley to notice something new: tiny, previously undescribed lines in the lungs of patients with heart disease.
| Cause | Mechanism | |-------|------------| | | Elevated left atrial pressure → fluid leaks into septa | | Lymphangitic carcinomatosis | Cancer cells (lung, breast, stomach, etc.) spread through lymphatics in the septa, thickening them | | Idiopathic pulmonary fibrosis | Scar tissue pulls and thickens the septa | | Sarcoidosis | Inflammatory granulomas along the septa | | Pneumonia (viral or atypical) | Inflammatory edema temporarily thickens septa | | Lymphoma or leukemia | Infiltration of septa by malignant lymphocytes | what are kerley b lines
Here is the full story of — from their discovery to their clinical significance. The Short Answer Kerley B lines are small, thin, horizontal lines seen at the very edges (costophrenic angles) of the lungs on a standard chest X-ray. They are a direct sign of interstitial pulmonary edema (fluid in the lung tissue itself), most commonly caused by congestive heart failure, but also by other diseases that scar or inflame the lung's support structure. The Full Story 1. The Discovery: Dr. Peter Kerley The story begins in the mid-20th century with Dr. Peter James Kerley (1900–1979), an influential British radiologist working at Westminster Hospital and the National Heart Hospital in London. Before Kerley’s work, radiologists could see large fluid