A nomogram model for predicting spontaneous rupture and bleeding of renal angiomyolipoma / 现代泌尿外科杂志

【Objective】 To establish a risk model for predicting spontaneous rupture bleeding of renal angiomyolipoma (RAML) in order to better assess and deal with the risk. 【Methods】 The information of 436 RAML patients diagnosed during Jan.2018 and Dec.2022 was retrospectively analyzed.According to the inclusion and exclusion criteria, 216 patients were included and divided into the rupture bleeding group (n=35) and non-rupture bleeding group (n=181).The factors influencing spontaneous rupture bleeding were identified using univariate and multivariate analysis, and a nomogram was constructed accordingly with R language.The nomogram was evaluated using Calibration curve and area under the receiver operator characteristic curve (AUC). 【Results】 It was found that clinical manifestations, tumor diameter, tumor convexity, tumor blood supply, and tuberous sclerosis complex (TSC) were significantly correlated with rupture bleeding.The Calibration curve fitted well with the nomogram.The AUC was 0.956 (95%CI: 0.856-0.943), indicating that the nomogram had good statistical performance. 【Conclusion】 The model can effectively predict the risk of spontaneous rupture bleeding of renal angiomyolipoma.

Construction and evaluation of a nomogram prognostic model for patients of prostate cancer with high tumor load bone metastases / 现代泌尿外科杂志

【Objective】 To identify the risk factors of patients of bone metastatic prostate cancer with high tumor load progressed to castration resistant prostate cancer (CRPC), establish a nomogram prediction model and evaluate its consistency and accuracy. 【Methods】 A total of 164 patients diagnosed by puncture and imaging during 2012 and 2022 were included.The general characteristics were analyzed with IBM SPSS software; the variables were screened with Cox regression; the multivariate risk factors with P<0.05 were included in the nomogram prediction model.The consistency and prediction accuracy of the model were evaluated with C-index, receiver operating characteristic (ROC) curve and calibration chart. 【Results】 In univariate analysis, initial prostate-specific antigen (PSA), prostate-specific antigen density (PSAD), Gleason score, T stage, alkaline phosphatase (ALP) and lactate dehydrogenase (LDH) were correlated with CRPC (P<0.05).Multivariate analysis showed that initial PSA, Gleason score, T stage, ALP and LDH were independent risk factors of CRPC (P<0.05).Based on the above five risk factors, a nomogram prediction model was constructed.The C-index was 0.801, the area under ROC curve (AUC) of 1-year progression-free survival (PFS) was 0.701 (0.608-0.794), and the AUC of 2-year PFS was 0.857 (0.767-0.947).The calibration chart showed that the prediction probability of the model was in good agreement with the actual probability. 【Conclusion】 Initial PSA, Gleason score, T stage, ALP and LDH are independent risk factors of CRPC.The predictive model may be an effective tool for the initial diagnosis of high tumor load bone metastatic prostate cancer, but more data are needed for internal and external validation.

Novel heterotopic continental ileal reservoir based on the Mitrofanoff principle: a case report and review of the literature.

For patients undergoing radical cystectomy with standard lymphadenectomy for bladder cancer, appropriate urinary diversion (with a pouch and conduit) improves postoperative quality of life, reduces postoperative complications, and prolongs survival. We developed a novel heterotopic ileal reservoir to achieve these goals. This report describes the methodology involved and the incidence of intraoperative and postoperative complications. Three patients who underwent novel heterotopic ileal reservoir creation following radical cystectomy and standard lymphadenectomy (for bladder cancer) were evaluated. The ileum served as a pouch in which the ureters and appendix were implanted by extramural tunnelling. The appendix served as a conduit and pelvic reperitonealization was performed. Operative times, intraoperative blood loss, time to intestinal function recovery, incidence of intestinal obstruction and ureteric reflux, and bladder volumes and continence levels were evaluated. The surgical intervention was successful with operation times ranging 410-525 min, blood loss ranging 300-700 ml, and recovery time for intestinal function ranging 3-5 days. The postoperative hospitalization time was 11-15 days. Subileus occurred in patient B, who recovered after fasting and fluid replacement. Patients B and C achieved complete continence 6 weeks after surgery, while patient A experienced umbilical urine leakage with catheterization time intervals that exceeded 4 h. At 3 months after surgery, the bladder capacities of all patients ranged 250-370 ml. Follow-up cystography suggested the presence of bilateral ureteral reflux in patient A, with mild and moderate reflux on the left right sides, respectively. All patients achieved complete continence. Patients were followed for 3-9 months postoperatively; chest and abdominal computed tomography and cystography showed absence of hydronephrosis, recurrence, or distant metastasis during this period. The novel heterotopic continent ileal reservoir described in this study may be suitable for selected patients. The surgical procedure is safe when performed by well-trained and highly experienced urologists.