If you see Kerley B lines but the heart size is normal, consider Acute Cardiac Failure (sudden onset, heart hasn't had time to dilate yet) or non-cardiac causes like lymphangitis carcinomatosa.
Kerley lines are named after the Irish radiologist (1900–1979). In the 1950s, while working at the National Heart Hospital in London, Kerley described a set of linear opacities visible on chest radiographs of patients with pulmonary congestion. He categorized them into three types (A, B, and C), of which Kerley B lines remain the most recognized and widely taught. pulmonary edema kerley b lines
Kerley B lines represent due to fluid distention. To understand this, a brief review of lung anatomy is necessary: If you see Kerley B lines but the