Topic: Partial Nephrectomy

Management of Small Renal Tumors: A Guidelines Based Approach

Mohammed E. Allaf, MD, presents a comprehensive overview of managing small renal tumors, focusing on a guidelines-based approach that integrates the latest evidence and expert consensus in the evolving landscape of renal tumor management.

In this 20-minute presentation, Dr. Allaf outlines the current guidelines for evaluating small renal masses. He highlights the critical factors influencing management choices, including gender, tumor size, location, patient comorbidities, age, and family history.

In discussing treatment options, Dr. Allaf examines active surveillance, radical or partial nephrectomy, and ablative therapies and the indications for each approach. He also touches on future directions in treatment and imaging while emphasizing the benefits of the current guidelines.

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Nephron-Sparing Renal Surgery: A Deeper Dive Into How Local Recurrence Issues Alter Preoperative and Postoperative Decision-Making

Richard E. Link, MD, PhD, Professor of Urology and the Carlton-Smith Endowed Chair in Urologic Education at the Baylor College of Medicine in Houston, Texas, discusses the evolving standard of care for renal tumors, and how to determine whether someone should have nephron-sparing surgery. He provides some history, explaining that radical nephrectomy used to be standard for all patients with renal tumors, but that due to improvements in technology and technique, partial nephrectomy is now used in a large percentage of cases. Dr. Link argues that with this great power to perform partial nephrectomies on almost all renal tumors comes a great responsibility to make sure that patients receive appropriate care for their individual cases. He observes that this can be complicated for multiple reasons, including that: decision-making about suitability for nephron sparing is not solely an oncologic decision; resecting more complex tumors may be associated with higher perioperative complication risks and likely results in more renal function loss; older or sicker patients tolerate complex or more lengthy surgery less well and may be less ideal candidates; and older patients likely have less to gain from nephron-sparing due to life expectancy. Beyond those concerns, Dr. Link lists and discusses several fundamental oncologic questions to consider in determining whether a patient is a good candidate for partial nephrectomy or not. These include assessing the risk of pathologic upstaging of “resectable appearing” tumors, the impact of tumor complexity on positive margins and how positive margins after partial nephrectomy alter outcome, the risk of de novo ipsilateral second primary tumors in the future and whether pathology and stage alter this risk in some fashion, and whether the patient would benefit more from a radical nephrectomy. Dr. Link concludes that: upstaging of cT1 tumors to pT3a at partial nephrectomy is relatively rare and portends a statistically significant if rather modest negative impact on recurrence free survival; risk of upstaging appears to be higher for larger tumors, higher RENAL scores, higher grade tumors, and those with irregular morphology; renal sinus fat invasion does not appear to be higher risk for poor oncologic outcomes than perinephric fat invasion; there is little data supporting better oncologic outcomes for radical nephrectomy as compared to partial nephrectomy for completely resected pT3 renal cell carcinoma; true positive surgical margins after partial nephrectomy have a significant negative impact on oncologic outcomes; larger tumors with higher RENAL scores raise the risk of positive margins at partial nephrectomy; and since little data exists about risk of second ipsilateral primary tumor development this should not drive decision making today outside of a genetic “diagnosis.”

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Is Open Partial Nephrectomy Still an Option for Challenging Renal Masses?

Michael A. Brooks, MD, Assistant Professor of Urology and Oncology at Baylor College of Medicine in Houston, Texas, evaluates open partial nephrectomy as an option for challenging renal masses and compares it to the robotic retroneoscopic and laparoscopic techniques. He begins by discussing three patient cases, each one using a different treatment option. The robotic retroneoscopic partial nephrectomy patient experienced minimal blood loss, an operation time of 4 hours, and was discharged on the 3rd day post-op. The laparoscopic partial nephrectomy patient also had minimal blood loss, a 3-hour operation time, and was discharged on post-op day 3. The open partial nephrectomy patient experienced greater blood loss, a 5-hour operation time, and was discharged on post-op day 2. Dr. Brooks also explained the technique for each, highlighting the importance of port placement for robotic surgery, a lack of cortical stitches to avoid compressing the kidney for open partial nephrectomy, and the use of intraoperative ultrasound for all three procedures. He then considers two papers, the first of which found that oncological outcomes for open and robotic patients were very similar but that open partial nephrectomy produced higher blood loss, longer ischemia time, and a longer post-op course in patients. The second paper focused on the impact of specific surgeons and found that surgeon skillset and experience created high variability in outcomes. Dr. Brooks concludes that open partial nephrectomy remains a good option for complex renal masses, that the approach can vary from patient to patient based on tumor characteristics, and that the approach is likely less important than surgeon training, experience, and case volume.

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Retroperitoneoscopic Kidney Surgery Tips and Tricks

As part of Grand Rounds in Urology’s ongoing series highlighting urologists working in Asia, Qian Zhang, MD, PhD, Professor and Vice Director in the Department of Urology at Peking University First Hospital in Peking, China, presents surgical tips and tricks for performing retroperitoneoscopic kidney surgery. After an introduction by Peter K.F. Chiu, MD, PhD, FRCSEd, Associate Professor of Urology at the S.H. Ho Urology Centre of the Chinese University of Hong Kong, Prof. Qian goes over the advantages of the retroperitoneal versus the transperitoneal approach, highlighting the shorter operation time, the ability to directly control the renal artery, and the lack of gastrointestinal interference. He also discusses some improvements to patient positioning, including placing the patient’s head as far forward as possible while placing their hip as far back as possible. Dr. Qian then looks at trocar placement and considers the importance of practicing 6 basic surgical skills, including cut, twist, rip, open up, pull, and push. He summarizes the 3-step and 2-step methods of needle adjustment, and then follows this by showing videos demonstrating his 6-step partial nephrectomy technique. The 6 steps include: (1) open fascia; (2) find tumor; (3) artery dissection; (4) tumor resection; (5) surface suture; and (6) unblock artery. Dr. Qian also shares some tips and tricks, focusing on his blocking method. The presentation concludes with a question and answer session led by Dr. Chiu. 

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Renal Mass and Localized Renal Cancer: Active Surveillance and Follow-up After Intervention

In part 2 of a 2-part series, Steven C. Campbell, MD, PhD, Professor of Surgery, Associate Director of Graduate Medical Education, Program Director and Vice Chair of Urology, and Eric A. Klein Chair for Urologic Oncology and Education at the Cleveland Clinic’s Glickman Urological and Kidney Institute, presents significant 2021 updates to the American Urological Association (AUA) guidelines on localized renal cancer, focusing on active surveillance (AS) and follow-up. Dr. Campbell, who served as Chair of the AUA Guidelines Panel for Management of Localized Kidney Cancer, begins by looking at the major revisions made to the AS guidelines, particularly with regard to specifications on which patients really should be considered for AS, the intensity of surveillance in different settings, and the role of renal mass biopsy. He then considers the revised guidance around follow-up after intervention. Dr. Campbell explains the general principles behind follow-up, highlighting the need to discuss implications of stage, grade, and histology including risks of recurrence and possible sequelae of treatment, as well as the importance of performing periodic imaging, lab studies, and medical histories in patients with treated malignant renal masses. He also covers what to do if surveillance suggests metastases or local recurrence. Dr. Campbell concludes by discussing risk-based protocols and follow-up guidelines based on risk categories and prior treatment.

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Renal Mass and Localized Renal Cancer Evaluation and Management

In part 1 of a 2-part series, Steven C. Campbell, MD, PhD, Professor of Surgery, Associate Director of Graduate Medical Education, Program Director and Vice Chair of Urology, and Eric A. Klein Chair for Urologic Oncology and Education at the Cleveland Clinic’s Glickman Urological and Kidney Institute, presents significant 2021 updates to the American Urological Association (AUA) guidelines on localized renal cancer, focusing on evaluation and management. After an introduction by E. David Crawford, MD, Professor of Urology at the University of California, San Diego, and Editor-in-Chief of Grand Rounds in Urology, Dr. Campbell, who served as Chair of the AUA Guidelines Panel for Management of Localized Kidney Cancer, explains that the primary focus of the panel was clinically localized renal masses suspicious for cancer in adults, including solid enhancing renal tumors and Bosniak 3 and 4 complex cystic renal masses. He then summarizes what has changed since the last guideline update. For evaluation and diagnosis, he highlights that MRI with contrast can now be used even in patients with severe chronic kidney disease or with end-stage renal disease since the risk of nephrogenic fibrosis with 2nd generation gadolinium agents is extremely low. Dr. Campbell also notes that language has been changed around renal mass biopsy to emphasize a utility-based approach, and that there are expanded indications for genetic counseling since 4 to 6% of cases of renal cell carcinoma are now thought to be familial. He then moves on to look at the revised management guidelines, pointing out a new statement advising that patients with high-risk or locally advanced, fully resected renal cancers should be counseled about the risks/benefits of adjuvant therapy and encouraged to participate in adjuvant clinical trials, facilitated by medical oncology consultation when needed. Dr. Campbell concludes by looking at new guidance on thermal ablation indicating that renal mass biopsy should be performed prior to thermal ablation rather than at the time of thermal ablation.

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Renorrhaphy Techniques During Partial Nephrectomy: Technical Points and Functional Outcomes

Pierluigi Bove, MD, Assistant Professor in Urology at the Tor Vergata University of Rome and Clinical Consultant at the University Polyclinic of Tor Vergata (Rome), argues that focusing on three goals— achieving parenchymal hemostasis at the end of the resection phase, ensuring closure of the collecting system, and avoiding indirect trauma—can help physicians decide which suturing technique to utilize. He explains the necessity of suturing experience, important aspects of the patient’s lesion and vascular anatomy to consider when decision-making, and how to utilize proper resection techniques in renorrhaphy.

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