Circulating Tumor DNA as Marker for Response to Antineoplastic Treatment of Metastatic Cancer (FLUIDO)

Early monitoring of antineoplastic treatment benefit is a central medical need. Radiologic assessment for documentation of response is done after several months of treatment usually. This implies that patients not responding are exposed to unnecessary toxicity. According to several reports showing the correlation of the amount of circulating tumour DNA with tumour burden we aim to investigate its early dynamic change at the beginning and during antineoplastic treament until radiologic response assessment. Blood samples necessary for that are taken within the scope of clinical routine care. We hypothesize that the changes of circulating tumour DNA correlate with the radiological findings.