[Effect of wound infiltration of ropivacaine in postoperative pain after extraperitoneal laparoscopic radical prostatectomy]. / Effet de l'infiltration pariétale d'anesthésique local (ropivacaïne) sur la douleur postoperatoire après prostatectomie radicale laparoscopique sous-péritonéale.

PURPOSE: Evaluation of the efficiency of wound infiltration of ropivacaine in postoperative pain after extraperitoneal laparoscopic radical prostatectomy. MATERIAL AND METHODS: Prospective single institution study included 130 patients treated by extraperitoneal laparoscopic radical prostatectomy from January to March 2007. One hundred and two patients were included and randomised in two groups according to the year of birth (pair or impair). Only patients from the first group (year pair) had wound infiltration at the end of the procedure. The second group (year impair) was the control group. An analogic visual scale (EVA) permitted evaluation of pain at 30 minutes, 1, 6 and 12 hours after the procedure. Use of analgesics after procedure were noted for each patient. RESULTS: In the first group, the median of EVA was 1.44, 1.34, 1.72 and 1.51 respectively at 30 minutes, 1, 6 and 12 hours. In the second group, the median of EVA was 1.28, 1.36, 1.46 and 1.44. We found no statistically significant difference for pain and use of analgesic between the two groups (p=0.71, 0.96, 0.47 and 0.86 respectively at 30 minutes, 1, 6 and 12 hours). CONCLUSION: Ropivacaine in wound infiltration did not decrease significantly the postoperative pain and must not be used systematically.

[Sporadic upper urinary tract urothelial cell carcinomas: identification of interaction between toxic carcinogens and individuals genetic susceptibility]. / Tumeurs des voies excrétrices urinaires supérieures sporadiques: identification de l'interaction entre l'exposition aux carcinogènes environnementaux et la susceptibilité génétique des individus.

Upper urinary tract urothelial cell carcinomas (UUT UCC) are rare sporadic tumors. Recent epidemiologic and molecular data have shown a singular susceptibility of UUT UCCs for specific risk factors. The main exogenic factors involved in UUT UCCs carcinogenesis remain tobacco and occupational exposure (aromatic amines, polycyclic hydrocarbures and chlored solvents). Enzymatic variants of detoxification system may be responsible of carcinogenesis with these toxics. Tumors induced by phenacetine consumption are decreasing since it was banned in the 1970s. Also, acid aristolochic exposure (Balkan nephropathy, Chinese Herb nephropathy) has been demonstrated to specifically induce UUT UCCs. Familial genic polymorphism of detoxification system would explain geographic distribution in endemic areas. In Taiwan, chronic arsenic exposition would constitute the main risk factor of UUT UCC. However, theses mechanisms of carcinogenesis remain unclear. The knowledge of UUT UCC development mechanisms implying toxic detoxification systems is still incomplete. To date, there is a growing body of evidence supporting that the interaction between individual genetic susceptibilities and environmental toxic exposure is a key to explain carcinogenesis in the majority of sporadic UUT UCC occurrence.