Kerley B Lines [new] -

Kerley B lines are a classic radiological sign typically identified on chest X-rays and CT scans, representing the thickening of the interlobular septa in the lungs. Named after the eminent Irish radiologist Sir Peter James Kerley, who first described them in 1933, these lines serve as a critical diagnostic indicator for various pulmonary and cardiovascular conditions, most notably congestive heart failure (CHF). What Are Kerley B Lines? In a healthy lung, the interlobular septa—the thin connective tissue planes that separate the lung's secondary lobules—are too thin to be seen on a standard X-ray. When fluid, cells, or fibrous tissue accumulate in these spaces, the septa thicken and become visible as distinct opacities. Appearance: Short, thin, horizontal lines that are typically 1–2 cm in length and less than 1 mm thick. Location: Most commonly found at the lung bases, specifically near the costophrenic angles. Orientation: They extend perpendicularly to the pleural surface and maintain contact with the lung's edge. Causes and Pathophysiology A Beeline Through Sir Peter James Kerley's Life - AJR Online

B-lines showed a prognostic value in several clinical scenarios, largely independent and additive over echocardiographic predictor... Open Exploration Publishing Kerley B Lines as a Radiologic Manifestation of Pneumocystis carinii ... Physical examination revealed the following: temperature, 101°F; pulse, 80 beats/min and regular; blood pressure, 110/50 mm Hg; re... CHEST Journal Chest X-ray - Cardiac disease - Pulmonary oedema - Interstitial This information does not constitute medical advice or diagnosis. Kerley B lines, also known as septal lines, are horizontal lines... Radiology Masterclass - Plain Film and High-resolution Computed Tomographic Assessment ... Oct 10, 2016 —

Kerley B lines are thin, short (1–2 cm), horizontal opacities seen at the periphery of the lungs on a chest radiograph . They are perpendicular to and in contact with the pleura, typically appearing most clearly at the lung bases near the costophrenic angles. Clinical Significance The presence of Kerley B lines indicates interlobular septal thickening . This occurs when the connective tissue septa between lung lobules become prominent due to fluid or cellular infiltration. Kerley Lines - an overview | ScienceDirect Topics

🫁 Kerley B Lines: A Quick Radiographic Sign You Need to Know 📍 What are they? Short, horizontal lines seen at the lung periphery (usually in the costophrenic angles). They are typically <2 cm long and extend to the pleural surface. 📍 Pathophysiology They represent thickened interlobular septa due to fluid, cells, or fibrosis. In acute settings, think: pulmonary edema (fluid in the septa). 📍 Common Causes kerley b lines

Cardiogenic pulmonary edema (most classic) Lymphangitic carcinomatosis Viral or atypical pneumonia Interstitial lung disease (e.g., sarcoidosis, asbestosis)

📍 Key Distinction from Kerley A Lines

A lines: Longer, branching, point toward the hilum (central lymphatics) B lines: Short, peripheral, perpendicular to pleura Kerley B lines are a classic radiological sign

📍 Why it matters In an acutely dyspneic patient, Kerley B lines = interstitial edema . This often precedes alveolar edema (“butterfly” pattern). Don’t wait for frank consolidation to treat heart failure. 📍 Pro tip On a supine portable chest X-ray, Kerley B lines may be subtle or absent. Look for peribronchial cuffing and cephalization as additional signs of elevated pulmonary venous pressure. 👩‍⚕️ Next time you see tiny horizontal lines at the lung bases, don’t dismiss them as artifact—think about the heart. #Radiology #ChestXRay #PulmonaryEdema #MedEd #FOAMrad

Comprehensive Report: Kerley B Lines Subject: Kerley B Lines (Septal Lines) Category: Radiology / Pulmonary Medicine Modality: Chest Radiograph (X-ray) and CT Scan

1. Executive Summary Kerley B lines are a specific radiographic finding seen on chest radiographs. They represent thickening of the interlobular septa—the connective tissue walls that separate the secondary pulmonary lobules. While they can be caused by various pathologies, they are most classically associated with pulmonary edema resulting from left-sided heart failure. Their presence indicates an interstitial abnormality within the lung and serves as a critical marker for clinicians assessing cardiopulmonary status. In a healthy lung, the interlobular septa—the thin

2. Historical Context The lines are named after Peter James Kerley (1900–1978), an Irish radiologist. In 1933, while working at the Westminster Hospital in London, Kerley described these distinct linear opacities in patients with mitral stenosis. His observation established a fundamental link between radiographic appearances and underlying pulmonary pathology, laying the groundwork for modern chest radiology interpretation.

3. Anatomical Basis To understand Kerley B lines, one must understand the anatomy of the secondary pulmonary lobule.