Chest Radiology > Pathology > Pulmonary Edema > Kerley B Lines
Kerley B Lines
These are horizontal lines less than 2cm long, commonly found in the lower zone periphery. These lines are the thickened, edematous interlobular septa. Causes of Kerley B lines include; pulmonary edema, lymphangitis carcinomatosa and malignant lymphoma, viral and mycoplasmal pneumonia, interstital pulmonary fibrosis, pneumoconiosis, sarcoidosis. They can be an evanescent sign on the CXR of a patient in and out of heart failure.
The patient above is suffering
from congestive heart failure resulting in interstitial edema.
Notice the Kerley's B lines in right periphery (arrows).