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 …