Acute interstitial pneumonia (AIP, earlier named Hamman Rich Pneumonitis) is a rare idiopathic lung disease characterized by diffuse alveolar damage with subsequent fibrosis. It has a fatal outcome in many cases. The histologic pattern aswell as the HRCT findings in AIP are indistinguishable from acute respiratory distress syndrome (ARDS). The HRCT characteristics are diffuse or patchy consolidation, often with a crazy paving appearance like in the case on the left. There are areas of consolidation and extensive areas of ground-glass density with a crazy-paving appearance. These abnormalities developed in several days and this rapid progression of disease combined with these imaging findings are very suggestive of the diagnosis AIP. #Clinical #Radiology #CTChest #AIP #AcuteInterstitialPneumonia #ILD #RadiologyAssistant
