[Dynamics of prostate-specific antigen concentration--growth kinetics of prostate cancer?].

Current research confirms that the prostate-specific antigen (PSA) is not just a protein required for liquefaction of the ejaculate but it plays biological role in the development of prostate cancer. Assessment of the PSA dynamics offers good opportunities for understanding the kinetics of growth of prostate tumors. The most frequently it is performed calculation of PSA doubling time (PSADT), a parameter that requires a logarithmic analysis and takes into account the exponential nature of tumor growth.

[First experience of Ho:YAG laser urethrotomy in the treatment of strictures in patients with prostate cancer].

Strictures of vesicourethral anastomosis (VUA), urethral strictures, and bladder neck obliteration are frequent complications occurring after treatment for prostate cancer and dramatically reducing the quality of life of the patients. To date, there is no single standard treatment of urethral strictures. One of the promising methods is laser optical urethrotomy using a solid-state Ho:YAG- laser.

[First experience of using positron emission tomography with 11C-choline in prostate cancer (PC)].

Introduction into clinical practice of combined positron emission technology and computer tomography (PET/CT) allows in one study to identify structural and functional abnormalities. The study involves 32 patients who underwent PET/CT with "C-choline, including 5 patients with prostate cancer (PC), 3--with chronic prostatitis and 24--with biochemical PC recurrence. PET/CT with 11C-choline has a high diagnostic efficacy in detection of local recurrence and PC metastases in patients with biochemical PC recurrence.

[Characteristics of surgical approach using for patients with renal cell carcinoma, complicated by postcava tumor thrombosis].

The postcava tumor thrombosis had about 1/3 of patients with renal cell carcinoma at the initial examination. Reconstructive interventions were performed on the postcava for 38 patients (24 men, 14 women). The postcava thrombectomy was applied in 15 patients.