An area of special expertise of the researchers is the molecular biological characterization of single cancer cells, which can be collected as circulating tumor cells by liquid biopsy or isolated from lymph node tissue or bone marrow as disseminated cancer cells. In order to define new treatment monitoring strategies, the liquid biopsy concept and the technology for single-cell analysis have been further developed, so that cancer cells from the cerebrospinal fluid (CSF) can now also be isolated and analyzed.