The aim of this scientific investigation is to identify biological factors (biomarkers) that allow the effectiveness of drug therapy to be predicted. The means that the tumour of the pancreas can be treated with molecular biological methods (in in the broader sense: laboratory tests) is examined in order to be able to make a decision in the future before the administration of therapy to predict whether the therapy has a good chance of having an effect or whether other therapy (e.g. other chemotherapy) should be used.