Kerley C __exclusive__

— from normal septa to visible B lines to confluent reticular opacities. In current practice, simply describing the location and morphology of septal thickening (e.g., “fine reticular opacities in the lower zones”) is more precise and clinically actionable.

Kerley C lines are typically seen in conditions that lead to interstitial edema, such as: kerley c

In some historical descriptions, they are considered the confluence of multiple Kerley B lines in the central lung regions, creating a complex interstitial pattern. — from normal septa to visible B lines