Acute Hypoxemic Respiratory Failure and Native Lung Idiopathic Pulmonary Fibrosis Exacerbation in Single-lung Transplant Patients with Cytomegalovirus Disease: A Case Series.

Our case series describes three patients who have received single-lung transplantations for idiopathic pulmonary fibrosis (IPF) that develop cytomegalovirus (CMV) disease and hypoxemic respiratory failure with radiographic opacification of the native lung and sparing of the allograft.Hypoxemia resolved with treatment and with resolution of CMV viremia. Viral infections causing IPF exacerbations have been described in the literature, however, pulmonary CMV disease in single-lung transplant recipients has typically been observed as pneumonitis of the allograft.These clinical scenarios are consistent with acute exacerbation of native-lung IPF and subradiographic pneumonitis of the allograft caused by CMV disease.