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‘Photographic negative of pulmonary oedema’: a classical radiographic pattern of chronic eosinophilic pneumonia
  1. Sujith V Cherian1,
  2. Elena Thampy2
  1. 1Department of Pulmonary, Critical Care and Sleep Medicine, University of Texas Health Science Center, Houston, Texas, USA
  2. 2Department of Internal Medicine, Coimbatore Medical College, Coimbatore, India
  1. Correspondence to Dr Sujith V Cherian, University of Texas Health Science Center, 6431 Fannin street, Houston, TX 77030, USA; sujithvcherian{at}gmail.com

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Introduction

Chronic eosinophilic pneumonia (CEP) is a rare disease accounting for 0%–2.5% of cases in different registries of interstitial lung diseases.1 Photographic negative of pulmonary oedema or reverse bat wing appearance is pathognomic of CEP, but seen in less than one-third of the patients. CEP is a rare disorder of unknown cause associated with subacute or chronic respiratory symptoms, characterised by the abnormal accumulation of eosinophils in the lungs.2 It occurs predominantly in women and non-smokers, with peak incidence in the fifth decade with a mean age of 45 years. Approximately half of these patients have a history of pre-existing asthma or atopic disorders. Most common symptoms include cough, dyspnoea and fever.3 Diagnosis of CEP is made based on a constellation of characteristic clinical, radiographic patterns along …

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