Editorial Comment for Sandhu et al.

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/140372/1/end.2012.0411.pd

Understanding Potential Intraoperative Impediments for Learning Laparoscopic Nephrectomy

Purpose: We evaluated factors that impact the ability to learn hand-assisted laparoscopic donor nephrectomy (HALDN) to identify impediments to diffusion of this procedure. Methods: From February 2002 to June 2004, we collected data from our institutional database on 70 patients who underwent HALDN. Time for individual steps of the procedure (colon mobilization, kidney/ureter mobilization, renal vein tributary dissection, renal hilum dissection, removal of the kidney, and overall time) were recorded. The impact of patient factors on surgical times was assessed using a general linear model. The impact of individual operative steps on overall operative time was assessed using Pearson correlation. The influence of case experience and training level were evaluated graphically and in a multivariable model. Results: A total of 13 residents, 2 fellows, and 1 attending surgeon participated in procedures for 70 patients. Body mass index (P = 0.03) and male sex (P = 0.04) prolonged operative times. Colon mobilization and hilar dissection were most correlated with overall operative time. While experience improved operative times for several steps, level of training appeared more likely to influence the time for individual operative steps. Conclusions: Impediments to learning HALDN include patient factors, level of training, and particular surgical steps. Repeated exposure at increasing levels of training may improve diffusion of laparoscopic nephrectomy among urologists.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/63194/1/end.2008.0439.pd

Robot-Assisted Retroperitoneal Partial Nephrectomy: Technique and Perioperative Results

Growing evidence supports the use of nephron-sparing techniques for the management of appropriately selected renal masses up to 7-cm. Compared with the surgical standard of open partial nephrectomy, minimally invasive approaches have demonstrated equivalent cancer control with reduced patient morbidity. Robot assistance has the potential to provide patients and physicians greater access to minimally invasive nephron-sparing surgery. We describe a robot-assisted retroperitoneal approach for the management of posterior renal masses. Our early results suggest reduced perioperative morbidity with the ability to manage more complex tumors.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90442/1/end-2E2010-2E0481.pd

Comparative study of TERT promoter mutation status within spatially, temporally and morphologically distinct components of urothelial carcinoma

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141213/1/his13318.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/141213/2/his13318_am.pd

Association of RENAL nephrometry score with outcomes of minimally invasive partial nephrectomy

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/98294/1/iju3222.pd

Measuring health-related quality of life outcomes in bladder cancer patients using the Bladder Cancer Index (BCI)

BACKGROUND. Health-related quality of life (HRQOL) has not been adequately measured in bladder cancer. A recently developed reliable and disease-specific quality of life instrument (Bladder Cancer Index, BCI) was used to measure urinary, sexual, and bowel function and bother domains in patients with bladder cancer managed with several different interventions, including cystectomy and endoscopic-based procedures. METHODS. Patients with bladder cancer were identified from a prospective bladder cancer outcomes database and contacted as part of an Institutional Review Board-approved study to assess treatment impact on HRQOL. HRQOL was measured using the BCI across stratified treatment groups. Bivariate and multivariable analyses adjusted for age, gender, income, education, relationship status, and follow-up time were performed to compare urinary, bowel, and sexual domains between treatment groups. RESULTS. In all, 315 bladder cancer patients treated at the University of Michigan completed the BCI in 2004. Significant differences were seen in mean BCI function and bother scores between cystectomy and native bladder treatment groups. In addition, urinary function scores were significantly lower among cystectomy patients treated with continent neobladder compared with those treated with ileal conduit (all pairwise P < .05). CONCLUSIONS. The BCI is responsive to functional and bother differences in patients with bladder cancer treated with different surgical approaches. Significant differences between therapy groups in each of the urinary, bowel, and sexual domains exist. Among patients treated with orthotopic continent urinary diversion, functional impairments related to urinary incontinence and lack of urinary control account for the low observed urinary function scores. Cancer 2007. © 2007 American Cancer Society.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/55989/1/22556_ftp.pd

The utility of upper urinary tract urine cytology before and after application of the Paris system

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/149260/1/dc24127_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/149260/2/dc24127.pd

Urinary bladder cancer staging in CT urography using machine learning

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/139956/1/mp12510.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/139956/2/mp12510_am.pd

The Impact of Previous Ureteroscopic Tumor Ablation on Oncologic Outcomes After Radical Nephrouretectomy for Upper Urinary Tract Urothelial Carcinoma

We investigated whether a history of endoscopic tumor ablation impacts oncologic outcomes after radical nephroureterectomy (RNU) for upper urinary tract urothelial carcinoma (UTUC). Using a multi-institutional database that contained patients who were treated with RNU, oncologic outcomes were assessed according to history of ureteroscopic tumor ablation. Disease-free survival (DFS) and cancer-specific survival (CSS) were estimated using the Kaplan-Meier survival analysis. Multivariate Cox regression analyses were performed to determine independent predictors of disease recurrence and cancer-specific mortality after RNU. The study included 1268 patients, 853 men and 415 women, with a mean age of 67.5 years (range 32-94 y) and 52.8 months median follow-up after RNU. A total of 175 (13%) patients underwent RNU after endoscopic tumor ablation and 1093 (87%) patients underwent RNU without a history of endoscopic ablation. The 5-year DFS and CSS rates were 72% and 77% in those with a history of tumor ablation vs 69% and 73% in those without a history of ablation (P = 0.171 and P = 0.365, respectively). In multivariate Cox regression analysis, history of ablation therapy was not associated with disease recurrence or cancer-specific mortality (hazard ratio [HR]: 0.79, P = 0.185 and HR: 0.7, P = 0.078, respectively). Our collaborative international efforts suggest that in selected patients, endoscopic tumor ablation does not adversely affect the recurrence and survival after subsequent RNU for UTUC. Our data support the continued role of ureteroscopic ablation of UTUC in appropriately selected patients.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90497/1/end-2E2010-2E0396.pd

Clinical Utility and Concordance of Upper Urinary Tract Cytology and Biopsy in Predicting Clinicopathologic Features of Upper Urinary Tract Urothelial Carcinoma

5% of urothelial carcinoma occurs in the upper urinary tract (UUT), a challenging location to biopsy. We aim to evaluate concordance between biopsy, cytology, and resection specimens in a large upper tract urothelial carcinoma (UTUC) cohort.117 UTUC resections with UUT biopsy and/or cytology specimens from 2000–2016 were retrieved; pathologic material was re-reviewed, evaluated for concordance, and correlated with clinical information. 14% pre-operative biopsies, including 8 from renal pelvis and 6 from ureter, lacked neoplastic diagnoses. 77% diagnostic biopsies included subepithelial tissue; 11% demonstrated reclassification of grade and 30% demonstrated reclassification of invasion status. 26% of renal pelvis UTUC and 36% ureter UTUC were invasive only on resection. Of 18 UTUC reclassified from noninvasive high-grade papillary urothelial carcinoma (HGPUC) to invasive HGPUC, 39% had prior radical cystectomy (versus 8% invasive UTUC and 11% noninvasive UTUC with concordant biopsies). Most high-grade UTUC (88%) and some low-grade UTUC (58%) resections had abnormal cytology results. Biopsy-resection pairs with concordant invasion status and pairs with discordant invasion status showed similar rates of recurrence (38% versus 38%) and metastasis (25% versus 27%). 14% of UUT biopsies lacked diagnostic neoplastic material. Grade concordance between biopsy and resection was high (89%), but 30% of cases showed invasion only on resection. Subepithelial tissue was less commonly present in ureter biopsies, particularly from mid or proximal ureter. UTUC in patients with prior cystectomy were more likely to show invasion on resection but not biopsy