Kerley B lines can be caused by a variety of conditions, including:
Physically, Kerley A lines have distinct characteristics that differentiate them from other lung markings. They are usually 2 to 6 centimeters long and very thin, measuring less than 1 millimeter in width. Unlike Kerley B lines, which are found at the lung bases near the ribs, Kerley A lines are located in the upper and mid-lung fields. They radiate outward from the hilum (the central area where vessels enter the lungs) toward the periphery, but they do not typically reach the edge of the lung wall. kerley a line
Kerley B lines are diagnosed using a chest X-ray. Further testing, such as a CT scan or lung biopsy, may be necessary to determine the underlying cause. Kerley B lines can be caused by a