[Lung transplantation for pulmonary emphysema--who, when, how?].

End stage pulmonary emphysema is the most common indication for lung transplantation worldwide. The shortness of donor organs and the better natural prognosis compared to other diseases leading to transplantation such as pulmonary fibrosis and cystic fibrosis demands careful patient selection.Lung transplantation is considered in patients with declining lung function after receiving all conservative treatment options including smoking cessation and rehabilitation programmes. Preoperative evaluation using consensus criteria needs to be performed by a multidisciplinary team in specialized centres. Assessment of co-morbidities is crucial, as they may significantly increase transplant-related mortality. The largest survival advantage from lung transplantation has been shown for the subgroup of patients below 60 years of age presenting with end-stage obstructive lung disease (FEV1 < 20% predicted) and respiratory failure. Similarly, high risk patients with secondary pulmonary hypertension or cachexia (BMI < 20) will likely benefit from transplantation.The 5-year-survival rate averages 60 percent, with superior outcome following double versus single lung transplantation. A clear survival benefit can only be achieved in a subgroup of patients, whereas the impact on quality of life seems to be even more important in patients suffering from chronic obstructive pulmonary disease.