Kerley B lines are specific radiographic landmarks seen on chest radiographs. They represent —the connective tissue walls that surround the secondary pulmonary lobules.
Accurate identification requires optimal viewing conditions and proper patient positioning. Kerley B Lines Kerley A Lines Peripheral bases Central hilum Length Course Horizontal Radial / Oblique Clinical Context Acute fluid overload Severe/Chronic congestion Visual Checklist for Radiologists Check the costophrenic angles. Look closely at the lateral lung margins. Differentiate from overlying skin folds or rib borders. Assess for concurrent cardiomegaly or pleural effusions. Clinical Implications and Next Steps kerley b lines on chest x ray
The presence of Kerley B lines is a critical radiographic finding indicating . In the acute setting, they are virtually synonymous with interstitial pulmonary edema . In the chronic setting or in a patient with a normal heart size, they should raise suspicion for lymphangitic spread of malignancy . Kerley B lines are specific radiographic landmarks seen
Kerley B lines represent thickened, fluid-engorged interlobular septa. They are short, parallel, horizontal lines. They run perpendicular to the pleural surface. Key Characteristics 1 to 2 cm long. Thickness: Less than 1 mm wide. Location: Lung bases. Orientation: Perpendicular to the pleura. Position: Peripheral lung fields. Pathophysiology Kerley B Lines Kerley A Lines Peripheral bases