1. PSA recurrence rate (Time Frame - 36 months after surgery): The PSA recurrence rate in patients with intermediate risk prostate cancer treated with radical prostatectomy with or without additional lymph node dissection at three years of follow up (PSA recurrence: PSA value ≥ 0.2 ng / ml).
Secondary outcome:
1. Incidence of lymphoceles and complications (Time Frame - 6 months after surgery): (Clavien classification)
2. quality of life including continence and potency (Time Frame - 6, 12, 24, 36 months after surgery): Questionnaire Expanded prostate cancer index composite (EPIC-26)
3. metastasis-free survival (Time Frame - 36 months): diagnosis of metastasis after prostatectomy by radiological assessment
Active Comparator: extended lymph node dissection Patients randomized to arm A undergo bilateral lymph node dissection in the pelvic area as part of prostatectomy. At least 10 lymph nodes must be removed.
No Intervention: standard without lymph node dissection Application of standardized surgical technique without extensive lymph node dissection. If, contrary to expectation, intraoperative suspicion of lymphogenic metastasis results, a lymph node dissection is performed and the patient is excluded from the study (freedom of the surgeon).
