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What is Which of the following condition is associated with the presence of Kerley B lines on chest X ray? and explain in detail?
Kerley B lines indicates thickening of interlobular septa. It occurs in interstitial oedema. They are horizontal, 1-2 cm in length, touch the pleural surface and is best seen laterally in the costophrenic angles. This appearance results from the regular organisation of pulmonary lobules at the lung bases. Interstitial edema is manifested on chest X Ray by: Kerly A or B lines Thickening of fissures Peribronchial cuffing Poor definition of pulmonary office or perihilar haze On CT these findings corresponds to: Smooth interlobular septal thickening Subpleural edema Thickening of the peribronchovascular interstitium Ground glass opacity Ref: Thoracic Imaging: Pulmonary and Cardiovascular Radiology