Chronic lung allograft dysfunction post-lung transplantation: The era of bronchiolitis obliterans syndrome and restrictive allograft syndrome

Table 1 Phenotypes of chronic lung allograft dysfunction

	Obstruction findings	Restriction findings	CT findings
	FEV1/FVC < 0.7	TLC decline ≥ 10% from baseline	Parenchymal opacities and/or pleural thickening
BOS	√
RAS		√	√
Mixed	√	√	√
Undefined (2 types)	√		√
	√	√

BOS: Bronchiolitis obliterans syndrome; CLAD: Chronic lung allograft dysfunction; CT: Computed tomography; FEV1: Forced expiratory volume in 1 second; FVC: Forced vital capacity; RAS: Restrictive allograft syndrome; TLC: Total lung capacity; √: Yes; Black box: No.