Kerley C Line

Kerley lines represent thickening of the interlobular septa (the connective tissue partitions between the secondary pulmonary lobules). The underlying mechanism is:

Kerley C lines represent a reticular pattern of interlobular septal thickening due to interstitial pulmonary edema. While less specific and more subtle than their A and B counterparts, their identification on a plain chest radiograph is a valuable sign of elevated left atrial pressure. Clinicians and radiologists should maintain a high index of suspicion for these lines in patients presenting with dyspnea and known cardiac disease. kerley c line