Lymphatic spread of bronchial carcinoma can reach any part of the medi
astinum, irrespective of the localisation of the primary tumor. Metast
atic spread may not affect al topographical lymph node positions, but
this is unpredictable. The number of lymph nodes in each position vari
es. Therefore, systematic mediastinal lymph node dissection includes a
ll ipsilateral compartments of the mediastinum. It is also possible to
reach contralateral sites. In right-sided thoracotomies the lymph nod
e dissection is standardized. Mobilizing the aortic arch and the large
vessels also allows complete mediastinal dissection by a left-sided a
pproach. The surgical technique is described. Perioperative morbidity
does not increase. Systematic mediastinal lymph node dissection is the
gold standard for evaluation of an exact pN stage. The stage-related
survival rate is significantly improved. Therefore, it should be requi
red that systematic mediastinal lymph node dissection be standard in t
he surgical treatment of bronchial carcinoma.