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Objective: To compare the morbimortality in the treatment of the renal tumors with and without presurgical embolization of the renal artery. Material and methods: This was an observational, retrospective, crosssectional and comparative study in the period from 01/01/2000 to 31/03/2007, carried out at the National Medical Center "La Raza" in Mexico City. Included for this study men and women from 18 to 90 years of age, with diagnosis of renal tumor in which radical nephrectomy was made. They were divided in two groups: group 1 those in which embolization of the renal artery was made previous to the surgery by the service of radiology and in the group 2 patients without embolization. Statistical analysis: Descriptive statistic. Results: In 121 patients with embolization of the renal artery, the ancestry and histological degree was not significantly representative, but dimensions and the pathological stage was statistically significant with transsurgical bleedding both with a p = 0.001. The survival was greater in those with embolization. Conclusions: The embolization of the renal artery is useful because it prolongs the survival of the patients and diminishes transsurgical bleedding in tumors of 9 cm or more and in advanced stages. [ABSTRACT FROM AUTHOR]

Objective: Describe the nephrectomy prevalence due to kidney neoplasm and the age groups in the Urology Service of the Hospital de Especialidades of the Centro Medico "La Raza". Material and methods: Retrospective, descriptive and transversal study. We include patients with nephrectomy due to kidney neoplasm in the Hospital de Especialidades of the Centro Medico "La Raza" during the period 2000-2006. Results: 121 clinic histories were reviewed. The mean age was 65.7 years. The higher prevalence by year was 27.3% (2006). According to the UICC classification the frequency of stages by tomography was 20.7% for T2N0M0 (n = 5). Respect the surgical modality the frequency of the nephrectomy was 96.7% (n = 117) for radical and 3.3% (n = 4) for partial nephrectomy. Regarding to the surgical approach the open surgery was 93.4% (n = 113) and laparoscopic 6.6% (n = 0). The kidney neoplasm prevalence was benign in 2.5% (n = 3) and malignant in 97.5% (n = 118), of these 98.3% (n = 118) were localized in kidney parenchyma and 1.7% (n = 2) in the kidney pelvis. Histopathology more frequently found was clear cell carcinoma 81.8%. Conclusions: The nephrectomy prevalence by kidney neoplasm was 2.6%. The mean age risk is in the sixth decade of life. The most common technique actually used is by laparoscopy, and cancer histopathology more frequently found is clear cell carcinoma. [ABSTRACT FROM AUTHOR]