are a specific radiographic finding on a chest X-ray that indicates thickening of the pulmonary interstitium. While they are the least frequently discussed of the Kerley line family—which includes A, B, and D lines—their presence is a vital indicator of underlying pathology, most commonly cardiogenic pulmonary edema. Definition and Radiographic Appearance
A highly cited and helpful paper for understanding these lines is the published in the New England Journal of Medicine . It provides clear visual examples and concise explanations of the anatomic basis for each line type. Key Characteristics of Kerley C Lines kerley c line
Figure 1. Posteroanterior chest radiograph of a 68-year-old male with acute decompensated heart failure. Bilateral Kerley B lines (short arrows) are visible at the costophrenic angles. In the mid-lung zones, a fine reticular pattern (arrowheads) represents Kerley C lines. Cardiomegaly and peribronchial cuffing are also noted. are a specific radiographic finding on a chest
Some radiologists believe they are simply Kerley B lines viewed "head-on" (en face) rather than in profile. It provides clear visual examples and concise explanations
Unlike the more famous Kerley B lines, which are horizontal and peripheral, Kerley C lines present as short, fine, reticular (net-like) opacities. They are typically found in the central and basal zones of the lung and do not reach the pleural surface. There are two primary theories regarding their appearance: