| Finding | Distinction | |--------|-------------| | | Plate-like, often horizontal, not septal, resolve differently | | Scarring (old TB/fibrosis) | Upper zone, retracted hilum, chronic | | Lymphangitic carcinomatosis | Nodular or irregular septal thickening, unilateral or asymmetric | | Pneumonia | Focal airspace disease, no rapid diuresis response | | Normal vessels | Taper, branch, continuous with hilum |
Introduction In the world of chest radiography, few findings are as visually striking or diagnostically specific as Kerley lines. First described by the Irish neurologist and radiologist Dr. Peter Kerley in 1933, these thin, linear opacities are a hallmark of interstitial pulmonary edema . kerley a and b lines