Interstitial lung disease (ILD) is a heterogeneous group of disorders characterized by dyspnea and bilateral infiltrations of the lung. While some cases are idiopathic (e.g., idiopathic pulmonary fibrosis), others are associated with systemic illnesses (e.g., autoimmune disorders), environmental exposures (e.g., asbestosis, hypersensitivity pneumonitis), or drug-induced, among other causes.1 In general, ILD results from inflammation and excessive accumulation of connective tissue matrices in the interstitium of the lung.