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Figure 1: General overview of the classification of interstitial lung disease

Presentation of interstitial lung diseases are broadly similar (i.e. dyspnoea, desaturation, fatigue, restrictive pattern of spirometry or chronic cough) and differentiation is difficult, hence the need for an appropriate multidisciplinary team. EP: eosinophilic pneumonia; LAM: lymphangioleiomyomatosis; LCH: Langerhans cell histiocytosis; PAP: pulmonary alveolar proteinosis Data taken from Travis WD, Costabel U, Hansell DM et al. Available at: