Can tumor cells and tumor DNA be sampled from blood samples from prostate cancer patients? Is it possible to understand the causal relationship between the occurrence of the tumor cells and the tumor DNA in the blood by reviewing the patient's medical records, including information about investigations, analytical reports or diagnoses? Can gene defects that may be useful in predicting the best treatment be detected by sequencing individual tumor cells or plasma from blood samples?
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Inclusion Criteria: * patients diagnosed with prostate cancer of moderate risk planned for prostatectomy with lymph node removal, or * patients diagnosed with prostate cancer stage 3, or * patients with diagnosed prostate cancer stage 4, or * patients with diagnosed benign inflammatory prostatitis or other benign urological condition constituting age-matched, cancer free, controls Exclusion Criteria: * Patients undergoing prostate cancer treatment (no prostate cancer treatment should be given to the patient before blood collection) * Patients with previous malignancy