Position, Disease, Peripheral Peripheral Disease Chronic Eosinophilic Pneumonia Affects the Alveoli and Alveolar Septal Interstitium Chronic eosinophilia is characterised by alveolar filling with eosinophils and inflammatory exudates(a) and interalveolar interstitial thickening, (overlaid in red in b). The infiltrates are classically peripherally positioned, usually upper lobes, more commonly bilateral but can be unilateral, and manifest as consolidation and or ground glass opacities. The CT shows bilateral peripheral consolidations in the upper lobesAshley Davidoff MD The CommonVein.net lungs-0775e IPF COP Subpleural and Extension Along the Fissures IPF and UIP NSIP Chronic Eosinophilic Pneumonia