Identification of Predictive Biomarkers

"Additional blood sample of about 30 ml that will be drawn for biomarker analyses (2 EDTA = ethylenediaminetetraacetic acid and 1 Cell-search-tubes).The drawn blood for CTC-Analysis and biomarker identification will be promptly processed ac-cording to the established standards at the Institute for Tumor Biology (see below).~The histological analysis of the resected tissue during salvage surgery is carried out according to clinical routine (conventional haematoxylin and eosin stained and PSMA-Immunohistochemistry). Additionally, tissue samples will undergo molecularpathological analysis if this does not affect routine pathological examination."