DIAGNOSIS AND TREATMENT OF URINARY SYSTEM TUMORS. URINARY BLADDER CANCER
Background. The advantage of our proposed therapy technique is to transit from the photodynamic diagnosis stage to effective therapeutic exposure (photodynamic therapy (PDT)) during one intervention.
Objective: to evaluate the efficiency and safety of the novel treatment option for superficial bladder carcinoma (BC).
Subjects and methods. The study enrolled 18 patients aged 66 ± 5 years (range 60−75 years) with superficial BC. A photosensitizer (photoditazine, Veta-Grand, Russia) was intravesically injected in a dose of 10 mg in 20 ml of saline solution 2 hours before intervention. Endoscopy was carried out on Storz PDT equipment with a monochrome light source at a wavelength of 402 nm, which corresponded to the maximum absorption spectrum for the molecule of photoditazine. The procedure was started with the PDT stage during which damaged bladder mucosal areas were found. Then there was transurethral resection of detected papillary masses and fluorescent areas with well-defined outlines. The fluorescent areas with ill-defined outlines underwent targeted light exposure at a wavelength of 402 nm for 5–10 min. The total light exposure of the bladder mucosa during the entire procedure was at least 30 min. The above procedure was performed in the patients at their inclusion into the study, then 1, 4, 7, 10, and 13 months later. The rates of complete tumor regression and adverse events were estimated during the study.
Results. Multifocal bladder mucosa lesion with invasion grades Ta, T1, Tis was detectable in all the patients at their inclusion into the study. Complete tumor regression was noted in 13 (72 %), 15 (83 %), and 17 (94 %) patients 1, 4, and 7 months after initiation of treatment, respectively. Following 10 and 13 months, no tumor tissue was found in the biopsy specimens from any patients. There were no evident local and systemic toxic reactions, including skin photosensitization.
Conclusions. The proposed technique versus the traditional treatments for superficial BC is advantageous in its high antitumor selectivity and the absence of obvious local and systemic toxic reactions (so in the possibility of multiple repetitions of a treatment procedure), and a complementary combination of photodynamic diagnosis and therapeutic exposure (PDT) during one procedure. Our proposed technique is a promising treatment for superficial BC, including carcinoma in situ.
DIAGNOSIS AND TREATMENT OF URINARY SYSTEM TUMORS. RENAL CANCER
Objective: to estimate the rate, predictive and prognostic value of VHL gene alterations in the population of patients with sporadic metastatic renal cell carcinoma (mRCC).
Subjects and methods. Paraffin embedded tumor tissue blocks were available from 88 patients with mRCC who had undergone antitumor therapy in 1994- 2010. Of them, 53 patients received only immunotherapy regimens with interferon (IFN)-α and 35 patients had targeted therapy with VEGFR inhibitors. VHL mutations were detected by polymerase chain reaction (PCR) for exons of 1-3, single-strand conformation polymorphism analysis of PCR products, and further sequencing. VHL gene methylation was determined by methyl-sensitive PCR.
Results. Somatic mutations and/or promoter hypermethylation of the VHL gene were found in 23 (26%) patients; Of them, VHL gene mutations and promoter hypermethylation were found in 15 patients and 7 patients respectively. Mutation and promoter methylation VHL were simultaneously observed in one case. VHL gene mutations were detected only in patients with clear cell RCC while aberrant promoter methylation was seen in both clear cell and papillary RCC. With a median follow-up of 34 months (range, 2-127 months), the median time to progression (TTP) and median overall survival (OS) for the entire group of patients were 5.8 and 26.7 months, respectively. In patients with and without VHL gene alterations, the median TTP was 5.5 and 6.9 months, respectively (p = 0.15) and the median overall survival time was 22.0 and 34.5 months, respectively (p = 0.98). Moreover, the subgroup analysis revealed that VHL gene inactivation events had no impact on the objective response rate (ORR), TTP and OS in the subgroup of patients who received immunotherapy (n = 53) or antiangiogenic targeted therapy (n = 35) (p > 0.05).
Conclusion. VHL gene mutations and/or promotor hypermethylation observed in 26% of patients with mRCC. These VHL gene alterations were neither prognostic nor predictive factors in mRCC patients during immunotherapy with IFN or antiangiogenic therapy with VEGFR inhibitors.
The paper describes a clinical case of a local recurrence of tubulocystic carcinoma (TCC) in a 46-year-old man, a relatively good course (the relapse occurred after 4 years), who has been successfully operated on and is being followed up. This disease is a rare renal malignancy and, until recently, it has been referred to as collecting tubular carcinoma. However, this disease has come to be regarded as an independent nosological entity, by taking into account its certain morphological, immunohistohemical, and cytogenetic characteristics, as well as the nature of its course. About 80 TCC cases have been described to date. Further study of this disease and other rare renal malignancies will allow the more accurate elaboration of management tactics for such patients in terms of certain prognostic factors, which calls for a larger number of cases of this disease.
REVIEW
after radical prostatectomy given its prolonged duration of action. The once-daily dose of tadalafil has the theoretical benefit in terms of safety and separation of medication from sexual activity. In this paper we review the published clinical and basic science research studies on the role of tadalafil in patients with postprostatectomy erectile dysfunction.
PROSTATE CANCER
Background. Retropubic radical prostatectomy (RPE) is now the gold standard of treatment for locally advanced prostate cancer (PC). However, robot-assisted RPE procedures using the da Vinci system are finding increasing acceptance.
Materials and methods. The authors conducted a prospective study of 60 robot-assisted prostatectomies made at the Clinic of Urology, N.I. Pirogov National Medical Surgical Center, in the period January 2009 to December 2010.
Results. The duration of an operation averaged 230 min; the average amount of blood loss was 200 ml. The mean duration of postoperative analgesia was 2,7 days. That of urinary catheterization was 8.5 days. A normal postoperative course was noted in most cases (88,4 %). Seven patients were found to have 8 (13,3 %) mild and moderate complications. A pathohistological study revealed a positive surgical margin of resection in 21,7 % of the patients, extracapsular tumor growth in 21,7 %, and seminal vesicle invasion in 23,3 %. Tumor-affected regional lymph nodes were detected in 1 (1,7 %) patient. In our observed series, 82 and 93 % of the subjects completely retained urine after 6 and 12 moths, respectively. Throughout the follow-up, erectile function recovered in 7 of the 15 patients undergoing a nerve-sparing surgical procedure.
Conclusion. Postoperative results in our series of interventions are comparable to those obtained in the studies by Russian and foreign colleagues at the early stage of mastering this procedure. By considering a few observations, it is today difficult to say that our study is valid in the context of evidence-based medicine. Estimation of the benefits of robot-assisted laparoscopic prostatectomy calls for long-term multicenter randomized trials.
Objective. The developing and introduction the quality of life (QL) automatized assessment in oncourological patients in clinical practice.
Subjects and methods. General questionnaire EORTC QLQ-C30 and modules (QLQ-PR25 and QLQ-BLM30) were selected for QL assessment. The software tools of hospital information system were used for development. There were surveyed 236 oncourological patients.
Results. Forms of unitary and dynamic researches were developed for result visualization, interactive modules were developed for data complex analysis. The first results of QL assessment were received. The highest values were in role and social functions (medians were equal 100 points). Fatigue, pain and sleeplessness were disturbed patients most of all (medians — 33,3, 16,7 and 33,3 points respectively). The median of Global health status was not high, only 50 points. There were analyzed three nosological groups of patients: urinary bladder cancer, renal cancer, prostate cancer. And the lowest values of functioning scales were in patients with urinary bladder cancer; also these patients complained of dyspnea reliably more often.
Conclusions. The developed technology of quality of life study can be used as a good methodological base for assessment of cure efficiency not only in early postoperational period, but during treatment, and in late time after termination of course of treatment.
CLINICAL CASE
LECTURE
Bladder cancer (BC) is one of the most common malignancies. More than 90 % of the notified cases are morphologically diagnosed as transitional cell carcinoma; moreover, over 70 % of them are the early stages (Ta, Tis, and T1) of the disease. Patients with diagnosed T1 tumor are deemed to be the most difficult group of patients with early-stage BC. Despite the generally good prognosis of the course of this stage of BC after performed therapy, the tumor recurs in most patients and progresses to a more disseminated stage in 15–20 %. In this connection, there is a continuous search for the prognostic markers associated with the poor prognosis of the disease. A number of morphological, immunohistochemical, and molecular signs that, according to the investigators’ data, correlate with the risk for BC recurrence and progression have been identified. Nonetheless, a diagnostic testing algorithm that permits the prediction of the course of the disease from primary histological data remains to be elaborated. There should be further investigations that enable one to develop an informative panel of diagnostic and prognostic markers that allow a pathologist to correctly define the stage and prognosis of the disease and a clinician to choose an optimal treatment policy for each patient.
ISSN 1996-1812 (Online)