[Sectoral interface-an opportunity for health services research?]

The request for increased outpatient care is currently widely discussed in healthcare debates. With that, the sectoral interface (outpatient/hospital) is receiving greater attention, which provides an incentive for better cooperation and coordination of all healthcare providers. This also marks an opportunity to establish new cross-sectoral structures-also for research. The definitions of cross-sectoral care and the research content need to be in a standardized and consolidated manner. The provision of treatment data along the entire patent's path remains essential for health services research. In this context, the cross-sectoral interface could be regarded as fragile in that it is particularly sensitive to disruptions. The current increasing digitalization can also be seen as an opportunity to minimize the loss of information through the further development of cross-sectoral structures and to improve patient care, while simultaneously making a contribution to research across sectoral borders.

[Radium-223 for the treatment of metastatic castration-resistant prostate cancer (mCRPC) : The androgen receptor-independent active agent in the therapeutic sequence]

BACKGROUND

Radium-223 improves overall survival and preserves quality of life in patients with metastatic castration-resistant prostate cancer (mCRPC) and symptomatic bone metastases and no known visceral metastases. Radium-223 can be used in combination with a luteinizing hormone releasing hormone (LHRH) analogue and as part of a sequential treatment scheme if disease progresses after at least two prior lines of systemic mCRPC therapies or if no other available systemic treatment is eligible.

OBJECTIVES

Today physicians are faced with a previously unknown multitude and complexity of options for the treatment of mCRPC. An increasing number of clinical trials contribute to the dynamics of the therapeutic landscape. Radium-223 was approved for mCRPC treatment in 2013. Up to now the recommendations of use have been adjusted several times. Highlighting recent clinical trials and practice, this paper explores the position of radium-223 within the therapeutic sequence and outlines key elements for the interdisciplinary cooperation between uro-oncologists and nuclear medicine specialists.

RESULTS

The mode of action of radium-223 does not depend on the androgen receptor (AR) pathway. Thus, it is an option in the therapeutic sequence when the efficacy of other agents is reduced by resistance. Furthermore, the efficacy of prior or subsequent medications are neither reduced nor enhanced by radium-223. The opportunity of an AR-independent and survival-prolonging medication should be taken as soon as the indication criteria are met because the incidence of visceral metastases increases during disease progression. According to current mCRPC guidelines, the osteoprotective use of bisphosphonates or denosumab is recommended, before treatment with radium-223 is started or resumed.

[Treatment situation in metastastic Castration Naive Prostate Cancer (mCRPC) and the implications on clinical routine]

There is an ongoing change of paradigm in the treatment of metastatic prostate cancer (mPC). Taxan-based chemotherapy demonstrated a prolonged survival of patients in several randomized phase III trials. This is true in the situation of metastatic castration-resistent prostate cancer (mCRPC) as well as in the hormone-naïve stage (metastatic castration-naive PC [mCNPC]). In patients with mCNPC, treatment with docetaxel in combination with androgen deprivation therapy (ADT) prolonged the median total survival time by 15 months in comparison to ADT alone. Comparable results were obtained by the endocrine combination treatment with ADT/abiraterone. With the current data in mind it seems to be useful to discuss the value of early combination therapy with ADT/docetaxel or ADT/abiraterone as well as the impact on further treatment options in the mCRPC setting and to define criteria for treatment decisions in clinical practice.

[Molecular tumor board-renal cell carcinoma]

The introduction of molecular targeted agents has fundamentally changed the treatment of metastatic renal cell carcinoma. A first wave of development was based on the improved understanding of tumor biology since the discovery of the importance of the von Hippel-Lindau gene as the key driver of the disease and paved the way for antiangiogenic agents. Of relevance is the overexpression of proangiogenic and proliferation-promoting factors (VEGF, vascular endothelial growth factor; PDGF, platelet-derived growth factor) as well as an overactivation of the PI3K-Akt signaling pathway: the target structure is the "mammalian target of rapamycin" (mTOR) molecule, which is involved in the regulation of cell proliferative processes. VEGF-, PDGF-, and mTOR-signals and signaling pathways are central targets of current targeted substances. A second wave is certainly to be seen in the development of therapeutic approaches with the targeted activation and modulation of the immune system, which has brought "immunotherapy" back into the focus of interest. Central development is the application of immune-checkpoint inhibitors, with the help of which (re-)activation of the cellular defense, especially of T cells, takes place, which per se holds the potential of a cytoreductive therapy by killing the tumor cells. Even though the prognosis has improved significantly due to the rapid development of recent years, treatment remains challenging as most patients experience progress, and long-term survival is only achieved in about 20% of cases because some patients are primarily refractory or do not respond. The more intensive interlocking of molecular biology, pathology, clinical research, and interdisciplinary uro-oncology, as is the claim of molecular tumor boards, can contribute to the individual selection of a suitable therapy strategy and, thus, establish the latest findings and developments for the benefit of patients in the clinic.

[Presurgical assessments]

For the estimation of perioperative risks and mortality in the context of radical urological tumor surgery in elderly patients, the guidelines meanwhile require the use of geriatric assessments. The aim of this work is therefore to explain frequently used geriatric assessments and to give an overview of their predictive significance in radical urological tumor surgery. Comprehensive geriatric assessments provide a good description of the patient's state of health, but are hardly feasible in clinical routine due to their complexity. It is more reasonable to use screening tools with subsequent targeted examination of high-risk patients. Special tools allow the standardized assessment of functional status, mobility, cognition, mood, nutrition, frailty, comorbidities and polypharmacy and have different prognostic significance. Evidence on the predictive value of assessments prior to radical urological tumor surgery is mainly described for the systematic classification of comorbidities. In cystectomy, the Charlson Comorbidity Index (CCI) and the American Society of Anesthesiologists (ASA) score allow an estimation of the risk of complications and mortality. The focus of assessments prior to prostatectomy is to identify patients with sufficient life expectancy to benefit from radical surgery. CCI and ASA scores as well as the Eastern Co-operative Oncology Group (ECOG) score can help to assess the risk of perioperative complications in kidney tumor surgery.

Timing of androgen deprivation monotherapy and combined treatments in castration-sensitive and castration-resistant prostate cancer: a narrative review

PURPOSE

Standard androgen deprivation therapy (ADT) can be initiated early at the time of diagnosis in asymptomatic castration-sensitive advanced prostate cancer. This definition has recently been expanded to also include an early combined treatment with standard ADT and new antihormonal drugs. We aimed to present the best available evidence for the timing of initiation of ADT monotherapy and combined treatments in castration-sensitive/-resistant prostate cancer.

METHODS

For this narrative review, we searched Cochrane reviews in the Cochrane Library, systematic reviews and randomized controlled trials in MEDLINE, phase III and ongoing trials in ClinicalTrials.gov and screened the reference lists to extract articles of interest. One author screened the references which were finally included after assessing their relevance through discussion with other experts in the field.

RESULTS

The identified references were grouped by medication (standard ADT, androgen biosynthesis inhibitor, androgen receptor antagonists or combined therapies) and tumor stage (castration sensitive or resistant). The evidence was narratively summarized and discussed in the context of the current therapeutic landscape.

CONCLUSIONS

Early standard ADT can reduce symptoms of disease progression and may extend progression-free and overall survival. The patient should be well informed about the higher rates of treatment-related side effects. Deferring standard ADT might be indicated only for well-informed or unfit patients. Early standard ADT is increasingly combined with new antihormonal drugs in castration-sensitive metastatic prostate cancer to gain additional survival and quality of life benefits. Combined treatment at the time of development of castration-resistant disease is well established.

[Follow-up of bladder cancer : The right examinations at the right time]

Schedules for the follow-up (FU) of bladder cancer patients are predominantly based on studies with low level of evidence and the resulting guidelines' recommendations that are often founded on expert consensus. FU of non-muscle invasive bladder cancer (NMIBC) includes cystoscopy and cytology as standard, and imaging modalities to a lower extent. FU of muscle-invasive bladder cancer (MIBC) depends primarily on the therapeutic modality chosen and on the stage of disease. In this scenario, FU is complemented by functional and quality of life related aspects. These apply even more for FU in palliative situations. Here, the individual focus is on examinations that might have a consequence in terms of survival and/or symptom relief.

[Metastatic prostate cancer : Update: position paper for the use of chemotherapy]

BACKGROUND

Taxen-based chemotherapy has been established as an effective treatment option in castration-resistant metastatic prostate cancer (mCRPC). Randomized phase III studies, however, have shown that even in the hormone-naïve metastatic state, the early use of chemotherapy in addition to the classical androgen deprivation therapy (ADT) approach leads to a significant increase in median overall survival.

OBJECTIVE

This position paper aims to provide current data and orientation in the evidence-based treatment of mPC patients in daily clinical practice.

MATERIALS AND METHODS

A German group of clinical experts analyzed the current data and developed criteria for the treatment of mPC patients in daily clinical practice.

RESULTS

In the current treatment of hormone-naïve mPC, a beneficial effect of chemotherapy in addition to ADT has become evident. Provided patients are in an appropriate condition, those with a high metastatic load should receive chemotherapy in addition to ADT. Especially in high-risk mCRPC patients (PSA >114 ng/ml, visceral metastasis, ADT response <12 months, tumor-associated complaints), first-line chemotherapy is indicated. After docetaxel failure, continuous treatment with cabazitaxel shows superior overall survival compared to sustained antihormonal therapy.

CONCLUSION

Chemotherapy is firmly established in treating patients with mCRPC. Long-term, it will be important to identify molecular predictors. The authors suggest the early use of chemotherapy in hormone-naïve mPC, but note that the approval in this indication is currently nonexistent. After disease progression, patients should be treated analogous to mCRPC.

[Operative therapy of spinal metastases from urological tumors]

The treatment of bone metastases from urological tumors represents a palliative form of therapy, apart from the resection of solitary metastases from renal cell carcinomas. Due to the high incidence of spinal metastases this can result in clinically significant symptoms and possible complications for patients, such as pain, spinal instability and compression of the spinal canal with corresponding neurological deficits. By the use of targeted diagnostics and induction of radiotherapeutic and/or surgical treatment, for the majority of patients an immediate reduction in pain as well as early mobilization and sometimes even regression of existing neurological deficits and therefore an improved quality of life can be achieved.

[Vertebral metastases of urogenital carcinomas: Diagnosis and conservative therapy]

The high incidence of bone metastases of urologic neoplasms and their morbidity, especially of vertebral metastases, requires exact diagnosis and consequent therapy. Conventional radiography plays an important role in the diagnosis of symptomatic bone lesions. Computed tomography can evaluate the stability of metastatic lesions and is indispensable for therapy planning. MRI and PET-CT have the highest diagnostic accuracy for the detection of bone metastases and MRI can evaluate their intra- and extraosseus components. PET-CT, PET-MRI, or SPECT-CT in combination with specific tracers - due to their high specificity and sensitivity - have the potential to replace conventional methods in the future. Conservative treatment basically consists of analgesic therapy, the administration of calcium and vitamin D3 and bisphosphonates or inhibitors of RANKL (denosumab). Moreover radium-223-dichloride can improve overall survival and the time to the first symptomatic skeletal event in castration-resistant prostate cancer patients with bone metastases.

Outcomes and response to therapy in bladder cancer. Are biomarkers of any help?

In oncology patients and clinicians are confronted with the search for measures which could help to elicit the individual patient's risk of future outcome, such as recurrence of disease after primary treatment, response to chemo-therapy or a general outline on the aggressiveness of a given lesion. In patient counselling, the emerging role of evidence based treatment choices reveals with cumulative certainty that the available information is inconclusive. This review will focus on current investigations of determinants to predict response to chemotherapy in advanced bladder cancer or to define prognosis of patients prior to any definite treatment. It will discuss the current evidence for the current systemic treatment options and highlight the many promising approaches of implementing markers either as a basis for a clinical decision in combination with other prognosticators (to better detect individuals at risk or to avoid unnecessary invasive procedures) or as a possible part of relevant pathways to be targeted. It will also discuss the role of biological markers with regards to the relevant clinical question and provide the current evidence to each field. It will highlight the need to further harmonize terminology, approaches and circumstances under which markers are evaluated and will provide suggestions for general methodological principles and guidelines for design, conduct, analysis and reporting of marker studies. The exploration of the current aspects of marker research may outline why collaborative, multicentre, and multidisciplinary efforts should be an integral part of future studies.

Transurethrale Resektion von Blasentumoren und Prostataadenomen in physiologischer Kochsalzlösung (TURIS)

BACKGROUND

Transurethral resection in a conductive irrigant medium is a new procedure in the surgical therapy of bladder tumors and prostate enlargement. In this prospective randomized trial we compared conventional TUR with TUR in saline regarding safety and efficiency.

PATIENTS AND METHODS

Between November 2004 and February 2005 a total number of 128 patients were included in this study. After randomization 58 patients were treated by conventional TUR and 70 patients by TURIS (Olympus, SurgMasterSystem). We evaluated resection time, weight of resected tissue, complications, blood loss, changes in serum sodium, and duration of catheterization.

RESULTS

Among the tested procedures no statistically significant difference could be observed concerning blood loss, change of serum sodium, and complications. The mean weight of resected tissue of the prostate per time was 0.9 g/min with the TUR procedure and 0.8 g/min with the TURIS procedure. Severe complications like TUR syndrome or perforation of the bladder were not observed at all. In the TURIS group time until catheter removal was longer but also the mean weight of resected tissue of the prostate was higher in the TURIS group (42 g) than in the conventional TUR group (31 g).

CONCLUSIONS

Transurethral resection in a conductive irrigant medium (TURIS) can be considered as a safe and effective surgical procedure in the treatment of BPH and superficial urothelial carcinoma. Moreover the risk of TUR syndrome and perforation of the bladder due to nerve stimulation is reduced.

Nichtinvasives und invasives Harnblasenkarzinom

Therapy of superficial bladder tumors is transurethral resection (TUR), and in cases of pT1 or high-grade tumors a re-TUR is indicated. Patients with carcinoma in situ receive intravesical chemotherapy or BCG for at least 3 months. Persistent carcinoma in situ may be treated by radical cystectomy. With the provision of a functionally adequate urinary diversion, cystectomy represents an effective treatment for patients with muscle-invasive bladder cancer without metastatic spread. Regional lymph node metastases can be found in up to 15% of stage T1 disease and are present in 33% of stage T3/4 lesions. Thus, lymphadenectomy gains diagnostic and possibly also therapeutic importance. For selected patients, who cannot be treated by radical cystectomy, multimodal concepts aiming to preserve the bladder are discussed. After or prior to cystectomy systemic chemotherapy may become necessary for some patients to positively affect the course of the disease in cases of locally advanced or metastatic lesions.

Stellenwert der systemische Chemotherapie des Harnblasenkarzinoms

Almost half of the patients with muscle invasive disease already harbor at the time of their first diagnosis occult or distant metastases. Systemic disease has a poor prognosis with a long term survival of less than 10%. The administration of systemic chemotherapy aims to improve the course of locally advanced or metastatic disease.A survival benefit of 5% for patients receiving neoadjuvant and 9-11% using adjuvant chemotherapy is in the first scenario minimal, in the adjuvant setting to be noteworthy. The MVAC-schedule and the Gemcitabine/Cisplatin-combination chemotherapy have to be regarded as standard for induction chemotherapy. However, the 5-year survival rates with 15 or 13% are disappointing.Thus, prognostic factors gain importance since with their consideration significant differences in survival rates can be found. Hope is provided by a novel class of substances, the target-specific drugs, which selectively interfere with the cascade of steps involved in tumorigenesis.

Harnblasenkarzinom

Bladder cancer is a malignant disease with exogenous and thus avoidable causative factors. Cigarette smoking is by far the most relevant risk factor and a clear dose-response relationship has been documented. That the bladder cancer risk decreases only a few years after the cessation of smoking is noteworthy. Occupational exposure, particularly to aromatic amines such as benzidine and beta-naphthylamine and to certain azo dyes, represents another important risk factor. At high risk are workers involved in the production of these chemicals and, to a lesser extent, those processing them. The currently known environmental factors seem to play a minor role. Treatment-induced risks causing secondary bladder cancer also have to be considered. Currently, the prevention of bladder cancer mainly involves avoiding exposure to known causative factors and early detection of the disease in high risk populations.

Perioperative Chemotherapy in Advanced Bladder Cancer - Part II: Adjuvant Treatment

Despite radical cystectomy, 40% of the patients with locally advanced disease and more than 80% of the patients with lymphatic metastases die tumor related. This provides the rationale for additional effective systemic therapy following surgery. In addition, previous surgery and consecutive histopathological or cell-based evaluation offers the advantage to expose only those patients to adjuvant systemic chemotherapy, who belong to a defined high-risk group. Regional lymph node metastases range from less than 10% in T1 to nearly 33% in T3/T4 lesions. Therefore, the extend of the lymph node dissection as an integral part of the surgical treatment gains importance. As pathological assessment of an adequate number of lymph nodes increases the likelihood of proper staging and decisions on further therapy depend on accurate staging, a standardization of lymphadenectomy is desirable. This paper provides an overview on the current concepts of the use of adjuvant systemic chemotherapy in the treatment of advanced urothelial cancer.

Perioperative chemotherapy in advanced bladder cancer: part I. Neoadjuvant treatment

Despite local tumor control, patients with locally advanced bladder cancer or lymphogenic metastasized urothelial carcinoma are at risk for systemic progress. Radical cystectomy is the gold standard treatment for muscle-invasive bladder tumors. Pelvic lymphadenectomy remains an integral part of the surgical treatment. However, the extent of the lymph node dissection depends on its diagnostic or curative intent and is more controversial. In addition, further treatment options such as systemic chemotherapy or combined radio-chemotherapy are needed to improve the outcome of locally advanced or metastasized disease. Therefore, administration of additional therapy to surgical treatment is intensively studied. The application of the neoadjuvant concept as well as the definite role of the adjuvant chemotherapy currently are contentious topics and subjects of meta-analyses and prospective randomized trials. In addition, bladder preservation as part of a multimodality treatment is still discussed as an option for selected patients unsuitable for radical cystectomy. This article gives an overview on the current concepts of the use of neoadjuvant systemic chemotherapy in the treatment of advanced urothelial cancer.

Surgical treatment of disseminated peritoneal metastases from urological cancer: results from a prospective study

OBJECTIVE

To report a prospective phase II study of patients with disseminated peritoneal carcinomatosis and symptomatic disease, in whom the peritoneal metastases were resected.

PATIENTS AND METHODS

From 1995 to 1999, 32 patients (20 men and 12 women, median age 56 years, range 32-75) with peritoneal carcinomatosis were enrolled in the trial. Pain and ascites were determined according to the National Cancer Institute score/criteria, and performance scored according to the World Health Organisation criteria.

RESULTS

All patients had intraperitoneal disseminated malignancies with clinically evident ascites, and presented with abdominal pain. The median (range) operative duration was 2.9 (1-5.5) h and the hospital stay 25 (10-44) days, with no deaths at 30 days. The ascites was completely cured in 25 of the 32 patients, pain relieved in 28 and the performance score improved in 25. The median survival time was 1 year; the 1- and 2-year survival rates were 45% and 38%, respectively. Patients with residual metastases after incomplete resection had a significantly worse prognosis, but the prognosis was significantly better in those with a low tumour burden.

CONCLUSIONS

Peritoneal carcinomatosis is treatable; radical peritonectomy improves the performance score in selected patients with cancer-related ascites and/or pain, and is now the standard approach in the authors' Cancer Centre.

Tumor cell motility as a novel target in cancer--experimental and clinical results

BACKGROUND

Surgery, chemotherapy and radiotherapy are the mainstay of tumor management. However, in systemic disease cure can be achieved in yet a few tumor entities. Based on cell biological research we have characterized the process of tumor progression and metastasis and disclosed that the loss of cell-cell adhesion in association with an increased tumor cell motility is an essential feature of the malignant potential of a tumor.

METHODS

According to this principle we derived therapeutical methods differing from hitherto existing treatments by being exclusively focused on tumor cell motility. Characterization of so-called anti-motility factors was performed biochemically as well as with motility assays by in vitro studies in established bladder carcinoma cell lines.

RESULTS

We evaluated the potential therapeutic benefit in a model of chemically induced bladder carcinoma followed by a phase I/II trial applying antimotility factors in patients with advanced bladder cancer.

CONCLUSION

Both basic research as well as the results of first clinical trials confirm, that advanced carcinomas can be influenced by inhibition of tumor cell motility.

p53 immunohistochemistry as a prognostic marker in bladder cancer. Playground for urology scientists?

OBJECTIVES

Anomalies of the p53 tumor suppressor gene have been reported for a variety of different tumor types. Also in urothelial cancer accumulation of the P53 protein has been linked with an unfavorable prognosis of the patients. Despite the growing number of publications confusion remains because key questions regarding p53 accumulation in bladder cancer are still unanswered. The objective of this manuscript was to review all published literature on the association of p53 accumulation and prognosis of patients with bladder cancer. Furthermore, putative reasons for the conflicting results should be defined as a basis for future research.

METHODS

The entry criteria for the analysis were met by 43 trials comprising 3,764 patients out of 138 publications found through Medline search.

RESULTS

Comparison between the trials yielded considerable differences obviously due to technical aspects, e.g. the selection of the antibody and the use of different cut-off values, study design and patient selection.

CONCLUSIONS

From this analysis it becomes evident that further retrospective investigations will not contribute to the solution of the problem and thus are obsolete. There is an obvious need for standardization of the assay procedure and the assessment of the specimens as well as for the initiation of a prospective multicenter trial to provide definite answers.

[Pelvic exenteration from the surgical viewpoint]

Pelvic exenteration (PE) is associated with specific problems in the indication of excision and reconstructive surgery. Indication are colorectal cancer or cervical cancer recurrence. In each case intensive and early cooperation of gynecologist, surgeon and urologist is warranted. Thus, PE is indicated in some T3 N1 and T4 rectal carcinoma patients without distant metastases and may be superior to chemotherapy. In cervix carcinoma recurrence, PE with or without intestinal reconstruction is of specific importance. While intestinal reconstruction may improve the quality of life in R0 resected patients we reluctantly perform this in noncurative treated patients, since their expected survival time is limited and reconstructive surgery in these pretreated patients (radiation and surgery) increases the risk of morbidity.