G. Pasticier

The epithelial-mesenchymal transition-inducing factor TWIST is an attractive target in advanced and/or metastatic bladder and prostate cancers.

PURPOSE Metastasis remains the main cause of death in both bladder (BCa) and prostate (PCa) cancers. The results of chemotherapy did not show any significant improvement of the survival the past years. Cancer research has led to the identification of signaling pathways involved and molecular targets that could change the natural history. The epithelial-mesenchymal transition (EMT), critical during embryonic development, becomes potentially destructive in many epithelial tumors progression where it is inappropriately activated. The cell-cell and cell-extracellular matrix interactions are altered to release cancer cells, which are able to migrate toward metastatic sites. Hallmarks of EMT include the down-regulation of E-cadherin expression, which is the main component of the adherens junctions. The protein TWIST is a transcriptional repressor of E-cadherin, tumor progression, and metastasis, and could be used as a molecular target to restore the chemosensitivity in BCa and PCa. MATERIALS AND METHODS We selected the last 5-year basic research literature on EMT and TWIST but also clinical studies on BCa and PCa in which TWIST is overexpressed and could be considered as an efficient prognostic marker and molecular target. RESULTS TWIST is considered as a potential oncogene promoting the proliferation and inhibiting the apoptosis. TWIST promotes the synthesis of the pro-angiogenic factor, vascular endothelial growth factor (VEGF) involved in tumor progression and metastasis. Apoptosis and angiogenesis are two essential cancer progression steps in many epithelial tumors, including BCa and PCa. CONCLUSIONS With the targeted therapy, oncology has entered into a new era, which is going to be critical in cancer treatment in combination with traditional anticancer drugs.

PET Scans for Decision-Making in Metastatic Renal Cell Carcinoma: A Single-Institution Evaluation

Objective: Therapeutic decision-making in metastatic renal cell carcinoma (MRCC) is based on conventional radiological evaluation. Fluorodeoxyglucose positron emission tomography (FDG-PET) scans may modify this strategy. Methods: Patients with MRCC for whom a therapeutic decision had been made underwent an FDG-PET scan in order to complete the standard radiological evaluation. Results: Twenty-four patients and 26 FDG-PET scans were eligible. In 18 patients, metastatic disease was evaluable on the computed tomography (CT) scan; the FDG-PET scan was positive in 16 patients and negative in 10. In 2 patients, the FDG-PET scan was positive while they were considered disease free on radiological evaluation. In 5 patients (20.8%), the previous therapeutic decision was changed. Thirteen patients had a pathological evaluation for 19 sites. One patient out of 13 had a false-positive FDG-PET scan, while 4 sites out of 6 were false-negative. The sensitivity was 75% (95% CI: 47.6–92.7) and the predictive positive value was 92.3% (95% CI: 64–99.8). With a median follow-up of 24 months, 3 patients developed new metastatic sites. Conclusion: Our data suggest that, when positive, an FDG-PET scan may modify the decision made; when negative, it should not modify decision-making especially for surgery, owing to its sensitivity.

Pathologies bénignes de l’ouraque chez l’adulte : origine embryologique, présentation clinique et traitements

Urachus pathologies are very rare but require to be known by urologists. Lack of appropriate treatment exposes the patients to the risks of symptoms recurrence, infectious complications or adenocarcinomatous degeneration. A partial or total defect of obliteration of the urachus channel after the fifth month of gestation can be at the origin of four benign pathologies. The ombilicovesical fistula (47.6%) is diagnosed at the native period. In the adult, the most frequent form is the cyst (30.7%) whereas the external (16.4%) and internal sinus (3.2%) are rarer. Diagnosis depends on the clinical examination and the association of sonography and TDM. The risk of complications must systematically result in proposing a surgical treatment for these benign pathologies. The umbilicus resection is not recommended, but the surgeon has to remove the urachus and its implantation base on the bladder. Laparoscopic surgery seems to be an interesting route for this intervention.

Epithelial growth factor receptor (EGFR) pathway and renal cell carcinoma

The epidermal growth factor receptor (EGFR) pathway is a very well-known pathway implicated in proliferation, growth and metastatic development of various tumor types. Consequently, EGFR pathway inhibitors have provided clinical benefits in many tumor types. EGFR expression is reported in up to 95% of renal cell carcinoma (RCC) and is considered high (3+) in up to 60%. In preclinical models, the EGFR pathway appears implicated in tumor development. Its mode of action includes the common EGFR signal transduction cascades, but it also interacts with the angiogenic pathway, especially the vascular endothelial growth factor receptor (VEGFR) pathway. Monotherapy with EGFR pathway inhibitors does not appear to modify the history of metastatic RCC (MRCC) and does not justify further experiments in this setting. The issues now requiring attention are the degree to which the EGFR pathway is involved in RCC tumors expressing high EGFR levels—a phase III study suggests that it influences outcome in these patients—and the clinical benefit of associating antiangiogenic therapy and EGFR pathway inhibitors in the light of successive phases II trials. In conclusion, the EGFR pathway is probably not a major pathway in RCC development compared to the antiangiogenic pathways, but could play a role in association with antiangiogenics or in the event of progression after antiangiogenic therapy. Additional preclinical data is needed to support these hypotheses.

Are we ready for day-case partial nephrectomy?

Fast-track and day-case surgeries are gaining more and more importance. Their development was eased by the diffusion of minimal invasive surgical strategies and the consequential morbidity reduction. In the field of kidney cancer, seven cases of ambulatory radical nephrectomy were previously reported in the international literature. Regarding robotic partial nephrectomy (PN), short postoperative pathways resulting in patients’ discharge on postoperative day 1 were shown to be safe and feasible. We report our initial experience of robot-assisted PN discharged on postoperative day zero and discuss the criteria for adequate patient selection. Indeed, outpatient PN will obviously not be suitable for all patients, and careful selection will be mandatory. Both specific baseline patient’s factors and postoperative events will have to be recognized for the first ones and prevented for the second ones. Safety, patient satisfaction, cost efficiency, and reproducibility will be the key factors to assess and promote day-case PN.

Le cancer de la prostate du sujet âgé

Prostate carcinoma is the most frequent cancer in French men. Prostate carcinoma in elderly is the topic of this review. The review included chapters on age as the main factor for prostate carcinoma, the modification of disease presentation or PSA level depending on age, and then the challenge of age in therapeutic decisions. Finally, we evaluate the place of elderly patients in prospective trials and in adjustable therapies.