AUA: Upper Tract Urothelial Carcinoma (2023)

See Original Guidelines

• Literature search up to January 2023

Background

• UTUC refers to urothelial tumors that originate from the inner lining of the ureter, calyces, or renal pelvis
• Estimated annual incidence in US: 7,000
  • Slightly less than annual incidence of testicular cancer: 8,000-10,000
• Peak incidence is seen in adults aged >70 years
• 3x more common in males than females in western countries
• Risk factors (5):
  1. Occupational exposure
  2. Geographic location
  3. Balkan endemic nephropathy associated with aristolochia herbal ingestion
  4. Chronic upper tract inflammation
  5. Hereditary factors such as Lynch and Lynch-like syndrome
• At the time of diagnosis
  • ≈25% will present as localized disease
  • >50% will present as regionally advanced cancers
  • ≈20% will present as distant disease

Diagnosis and Evaluation

Urologyschool.com Summary

• History and Physical Exam (1):
  1. Personal and family history
     • To identify known hereditary risk factors for familial diseases associated with Lynch Syndrome
• Laboratory (2):
  1. Selective ipsilateral upper tract urine cytology
  2. Estimated GFR/Serum Cr
• Imaging (1):
  • CT urogram
  • Metastatic staging [not discussed in guidelines]
• Other (3):
  1. Cystoscopy to assess lower urinary tract
  2. Upper tract endoscopy and biopsy
  3. Universal histologic testing of UTUC with additional studies, such as immunohistochemical or microsatellite instability

History and Physical exam

• History
  • Personal and family history to identify known hereditary risk factors for familial diseases associated with Lynch Syndrome
    • If positive, referral for genetic counseling should be offered.
      • Patients with Lynch Syndrome undergo routine screening due to increased life-long risk for developing associated malignancies, often occurring before 50 years of age
    • Lynch syndrome
      • Familial, autosomal-dominant multi-organ cancer syndrome
      • Due to an inherited germline mutation in a group of DNA damage response genes responsible mismatch repair (MMR), specifically MLH1, MSH2, MSH6, PMS2, or EPCAM
        • Alterations affecting the normal function of these genes results in an accumulation of DNA errors and increases the potential for cancer development
      • Associated cancers (11):
        1. Colorectal (20-80%)
        2. Urothelial (1-18%)
           • Accounts ≈7-20% of UTUC cases in the U.S
        3. Gastric cancers (1-13%)
        4. Endometrial (15-60%) in females
        5. Ovarian cancer (1-38%) in females
        6. Biliary
        7. Small bowel
        8. Pancreatic
        9. Prostate
        10. Skin
            • Sebaceous adenoma, sebaceous epithelioma, sebaceous adenocarcinoma, keratoacanthoma, and squamous cell carcinoma[1]
        11. Brain
      • May increase the possibility of contralateral upper tract involvement, which is an important potential clinical consideration when developing a treatment plan.

Laboratory

• Selective ipsilateral upper tract urine cytology
  • Provides supplemental histologic data to tumor biopsies
    • High-grade cytology in the setting of low-grade biopsy findings indicates the likely presence of higher-risk features (e.g., high-grade tumor) missed on biopsy sampling.
  • Urine cytology is reported according to 7 categories (Paris System):
    • Nondiagnostic
    • Negative for high-grade urothelial carcinoma
    • Atypical urothelial cells
    • Suspicious for high-grade urothelial carcinoma
    • High-grade urothelial carcinoma
    • Low-grade urothelial neoplasm
    • Other malignancies
  • Can be obtained either as barbotage (saline irrigation and aspiration) or by saline irrigation with passive collection (washings)
  • Preferred over a voided urinary specimen, due to (3)
    1. Improve cellular yield
    2. Avoid potential contamination in case of concomitant bladder and/or prostatic urethral disease
    3. Avoid theoretical dilution of the specimen from a normal contralateral unit
  • Should be collected prior to any contrast use to avoid artifactual cellular changes from contrast solutions
  • Collecting selective cytology after tumor biopsy can improve the yield of cells for cytologic analysis.
• Assessment of renal function
  • Initial decisions regarding operative approach and administration of systemic therapy are based on patients’ baseline renal function and their estimated post-operative estimated glomerular filtration rate (eGFR).

Imaging

• Cross-sectional imaging of the upper tract with contrast including delayed images
  • Preferred modality: multiphase computed tomography (CT) scan with excretory phase imaging of the urothelium.
    • Pooled sensitivity of 92%
    • Pooled specificity of 95%
  • If contraindications to contrast-enhanced CT such as chronic kidney disease (CKD) (e.g. eGFR <30[2]) or untreatable allergy to iodinated contrast medium, use magnetic resonance (MR) urography
    • MRI is less sensitive than CT, similar specificity
  • If contraindications to multiphasic CT and MR urography, use retrograde pyelography in conjunction with non-contrast axial imaging (renal ultrasound) to assess the upper urinary tracts.

Other

• Cystoscopy to assess lower urinary tract
  • Essential component of the evaluation for patients with suspected UTUC due to the risk of concurrent lower tract urothelial cancer in this population

• Upper tract endoscopy +/- biopsy of any identified lesion
  • Diagnostic ureteroscopy
    • Indications for ureteroscopy or percutaneous endoscopy of the upper urinary tract (and when diagnostic and prognostic details are needed)
      1. Lateralizing hematuria
      2. Suspicious selective cytology
      3. Radiographic presence of a mass or urothelial thickening
    • Document key descriptive features of UTUC that may guide further diagnostic testing and inform therapeutic interventions as well as provide points of comparison for subsequent ureteroscopic surveillance including:
      1. Location (ureteral segment, renal pelvis, calyceal sites and lower tract)
      2. Size
      3. Number
      4. Focality
      5. Appearance (sessile, papillary, flat/villous)
      6. Quality of visualization
         1. Can impact the accuracy of endoscopic inspection (e.g., bleeding, difficulty in access, tumor location, artifacts from instrumentation) and should be documented in endoscopic reports.
         2. See checklist in Table 3
  • Biopsy of any identified lesion
    • Methods of biopsy
      • Ureteroscopic biopsy with forceps
      • Fluoroscopically guided retrograde brush biopsy
    • Mucosal abnormalities
      • May be difficult to biopsy effectively
      • Attempted tissue confirmation may be facilitated with the use of brush biopsies or percutaneous image-guided biopsy.
  • Rare situations where endoscopic upper tract evaluation may not be necessary (2)
    • When other diagnostic means clearly confirm the diagnosis of UTUC and thus histologic tissue confirmation is not clinically required.
      • High-grade (HG) selective cytology or other source of tissue diagnosis, and clear and convincing radiographic findings of upper tract urothelial-based tumor(s) such as patients with an obvious enhancing, urothelial based soft-tissue filling defect on contrast-enhanced imaging with urography. Such situations may be particularly relevant in patients with a history of HG urothelial cancer.
    • When findings would not influence decision-making, such as patients with severe co-morbidities who are ineligible for intervention or request expectant management.
  • If concomitant lower tract tumors (bladder/urethra) discovered at the time of ureteroscopy, the lower tract tumors should be managed in the same setting as ureteroscopy.
    • Consensus on prioritization of procedure sequencing (managing bladder before or after same-setting ureteroscopy) is lacking and heavily scenario-dependent.
      • Rationale for managing the bladder first include optimizing visualization within the bladder, avoiding back-pressure or back-washing into the upper tract in the case of post-ureteroscopy stenting, and permitting final confirmation of bladder hemostasis.
      • Addressing the upper tract first may be preferred in cases of bulky bladder tumor involvement where complete resection is not possible or bulky upper tract disease in which risk assessment is the priority.
    • Seeding of tumors from bladder to upper tract or from upper tract to the lower tract have been raised as legitimate concerns which some have addressed by advocating use of ureteral access sheaths in such circumstances, yet the benefits of this approach require further prospective study.
  • In cases of existing ureteral strictures or difficult access to the upper tract, minimize risk of ureteral injury by using gentle dilation techniques such as temporary stenting (pre-stenting) and limit use of aggressive dilation access techniques such as ureteral access sheaths.
    • Perforation or disruption of the urothelium in patients with UTUC can risk tumor seeding outside the urinary tract.
      • Recognized perforation or injury events should be documented with immediate cessation of the procedure as soon as safely possible with additional steps to limit sequelae (e.g., stenting, bladder decompression with urethral catheter drainage to limit reflux, nephrostomy tube placement in cases of a completely obstructive ureteral tumor and evidence of contrast extravasation).
    • Precautionary measures in cases of difficult ureteral access such as avoiding dilation or placing a stent without performing ureteroscopy and then returning one-two weeks later to repeat the procedure (pre-stenting) can decrease the risk of iatrogenic injury and provide opportunity for a safer and more successful procedure.
  • In cases where ureteroscopy cannot be safely performed or is not possible, an attempt at selective upper tract washing or barbotage for cytology may be made and pyeloureterography performed in cases where good quality imaging such as CT or MR urography cannot be obtained.
    • When endoscopic examination of the involved upper tract is not possible, findings from selective cytology and retrograde pyelography may provide useful, objective and sufficient information for risk stratification .
      • Example scenarios may include washings taken at the time of percutaneous nephrostomy tube placement or during attempted retrograde ureteroscopy that is abandoned for safety concerns.
  • At the time of ureteroscopy for suspected UTUC, ureteroscopic inspection of a radiographically and clinically normal contralateral upper tract should not be performed.
    • Endoscopic procedures have risks for patient injury and the potential for tumor seeding in the presence of urothelial cancer. Performing upper tract endoscopy in the setting of a completely normal contralateral upper urinary tract without clinical indication or as a “screening” procedure is unnecessary, placing patients at undue risk and should not be performed
• Universal histologic testing of UTUC with additional studies, such as immunohistochemical (IHC) or microsatellite instability (MSI)
  • Routine tissue testing provides a more sensitive, first-line means to identify LS-associated features in tumor samples, thus providing clinically significant information for patient counseling and management as well as screening for family members.
    • Immunohistochemical testing
      • Can preliminarily identify the altered proteins associated with LS, and thus help to identify patients who may have the syndrome, who then require confirmation with further genetic (germline) testing
      • Widely available
    • Microsatellite instability
      • Identifying the presence of LS-associated and MSI-high cancers also has clinical implications related to therapeutic treatment options, including identified sensitivity of urothelial cancers with mutations in DNA damage repair genes to systemic agents such as immune checkpoint inhibitors and cisplatinum-based chemotherapy

Optional

• Urine fluorescence in situ hybridization (FISH)
  • May be considered adjunctively to adjudicate atypical or suspicious cytology results.
• Retrograde pyelograms
  • Provide a roadmap for evaluation and possibly planning kidney-preserving strategies
  • Should be considered at initial evaluation with images retained in the patient record

Risk Stratification

• Categorized as high- vs. low-risk of disease progression and pathologic stage ≥T2 disease
  • Based on biopsy grade
    • Association of high grade tumor on ureteroscopic biopsy with high-stage disease (≥pT2) on final pathology
      • PPV: 60%
      • NPV:77%
  • Sub-stratified into favorable vs. unfavorable (see Table 4), based on (4):
    1. Cytology
    2. Radiographic appearance
       • Multifocality
       • Size
       • Invasive features
         • Heterogenous texture on enhanced and even unenhanced CT imaging has been associated with invasive disease
       • Obstruction of the urinary tract
       • Locoregional progression such as suspicious lymphadenopathy
       • Presence of metastatic disease
    3. Endoscopic appearance
       • Multifocality
       • Size
         • Tumors ≥ 1.5 cm in size are associated with a > 80% risk of invasive disease
         • Measurement in the pre-surgical setting is not standardized and has not been shown to be independent of other more easily determined clinically identified features such as multifocality, invasion and obstruction.
       • Appearance (sessile, papillary, flat/villous)
    4. Lower tract involvement
       • Pan-urothelial disease as indicated by history of prior cystectomy, concomitant or metachronous lower tract urothelial cancer or contralateral UTUC diagnosis

Management

UrologySchool.com Summary

• If low-risk
  • Favorable
    • Tumor ablation (preferred)
  • Unfavorable
    • Tumor ablation (optional)
    • Radical nephroureterectomy or segmental ureterectomy
  • If low-risk and complete endoscopic ablation not feasible, chemoablation (in-situ tissue destruction) with mitomycin containing reverse thermal gel can be a treatment alternative
• If high-risk
  • Favorable
    • Radical nephroureterectomy or segmental ureterectomy
    • Tumor ablation (optional)
      • Select patients who have low-volume tumors or cannot undergo RNU
  • Unfavorable
    • Radical nephroureterectomy or segmental ureterectomy

Patient counseling

• Provide patients with a description of the short- and long-term risks associated with recommended diagnostic and therapeutic options, including
  • Need for endoscopic follow-up
    • Urothelial recurrences are common in the management of UTUC, regardless of approach, and mandate long-term surveillance for which patients must be prepared – including the potential need for additional treatments.
  • Risks of treatment
    • Risk of clinically significant strictures
      • Ablative options can provide local control including durable long-term kidney sparing outcomes but incur additional endoscopic surveillance requirements and associated risks such as stricture and infection
      • Use of chemoablative treatment with the reverse thermo-hydrogel preparation of mitomycin for pyelocaliceal instillation for LG tumors carries an FDA label warning for ureteral obstruction (>44%), bone marrow suppression, and embryo-fetal toxicity.
    • Toxicities associated with surgical treatment
      • Risk of post-NU CKD or dialysis.
        • Initial decisions regarding operative approach and administration of systemic therapy are based on patients’ baseline renal function and their estimated post-operative estimated glomerular filtration rate (eGFR).
          • Results of renal function investigations can help with patient counseling, strategizing treatment sequence, and determination of downstream risks of CKD and potential dialysis.
          • Patients with UTUC should, therefore, undergo an assessment of baseline renal function and, for individuals who are scheduled to undergo NU and especially those who may require perioperative systemic treatment, an estimation of post-operative renal function should be made.
            • Recommended tests include serum creatinine to calculate an eGFR and, at the clinician’s discretion for more refined evaluation, split function testing such as with differential renal scan or CT volumetric studies.
            • Predictive factors for post-operative development of CKD or progression of pre-existing CKD include (8):
              1. Older age
              2. Diabetes mellitus
              3. Hypertension
              4. Male sex
              5. Obesity
              6. Tobacco use
              7. Larger tumor size
              8. Post-operative acute kidney injury.
        • Perioperative nephrology consultation can be considered as well, particularly in patients with pre-existing kidney disease.
          • Indications for nephrology consultation:
            • Baseline eGFR <45 mL/ min/1.73m2
            • Confirmed proteinuria
            • Expected to have an eGFR <30 mL/ min/1.73m2 after intervention
          • Identifying modifiable risk factors including diabetes mellitus (DM), hypertension (HTN) and smoking is essential. Optimizing glycemic and blood pressure control, smoking cessation and minimizing risk of acute kidney injury (with avoidance of hypotension and nephrotoxic agents such as intravenous contrast or non-steroidal anti-inflammatory drugs) should reduce the degree of renal dysfunction in the perioperative period.
          • Patients undergoing NU have diminished postoperative renal function due to loss of a renal unit.
            • In patients with sufficiently poor CKD in which NU could precipitate ESRD, a post operative plan for dialysis in conjunction with nephrology colleagues should be in place preoperatively including plans for dialysis access. Referral to nephrology for detailed evaluation and recommendations for perioperative management is warranted in such cases
        • Attention should be paid in the settings of renal atrophy and hydronephrosis, which may alter clinical estimates of resulting post-operative renal function.
          • Hydronephrosis caused by tumor obstruction may falsely under-estimate preoperative renal function and alter decision-making around the use of neoadjuvant chemotherapy (NAC).
            • In settings of hydronephrosis, renal decompression either by indwelling ureteric stent or a percutaneous nephrostomy tube placed in an uninvolved renal calyx along with oral fluid hydration for 7-14 days before re-checking eGFR will help to establish a more accurate estimation of baseline renal function.
              • Ureteric stenting is the preferred method of drainage given the known risk of tract seeding with percutaneous nephrostomy tubes in the setting of UTUC as well as quality of life considerations
          • Atrophy of the contralateral (unaffected) renal unit may lead to over-estimates of postoperative renal function in the setting of NU since the kidney with lower differential function will remain in situ
        • In patients with pre-existing CKD or a solitary kidney, attempts to preserve renal function can be made, if oncologically feasible and appropriate, with segmental or endoscopic organ-sparing approaches which preferentially are associated with improved postoperative renal function.
    • Side effects from neoadjuvant and adjuvant therapies.

Kidney Sparing Management

• Tumor ablation
  • Indications
    • Preferred initial management for LR favorable UTUC, when technically feasible
      • Observational studies suggest similar cancer-specific survival, similar complication rates, and improved renal function outcomes with endoscopic ablation, compared to nephroureterectomy
      • If low-risk and complete endoscopic ablation not feasible, chemoablation (in-situ tissue destruction) with mitomycin containing reverse thermal gel can be a treatment alternative
        • Risk of ureteric stenosis Instillation of mitomycin containing reverse thermal gel
    • Optional initial management for LR unfavorable UTUC and select patients with HR favorable disease who have low-volume tumors or cannot undergo RNU
      • For patients with LR unfavorable disease who demonstrate progression in tumor size, focality, or grade, the Panel recommends against further endoscopic-assisted attempts and consideration of definitive resection via segmental ureterectomy (SU) or NU.
    • Tumors < 1.5 cm in size may be optimal for endoscopic ablation given a lower risk of invasive disease.
      • Tumors ≥ 1.5 cm in size are associated with a > 80% risk of invasive disease
      • Larger tumors (≥ 1.5 cm) may be considered for ablation based on the provider’s experience and assessment of the need for kidney sparing surgery.
  • Approach
    • May be accomplished via a retrograde or antegrade percutaneous approach
      • Antegrade approach typically reserved for larger tumors, those that are difficult to access in a retrograde fashion, or in patients who have undergone prior radical cystectomy or urinary diversion
    • Energy source
      • Thulium laser, holmium laser, Neodymium (Nd:YAG), and electrocautery devices (e.g., Bugbee) may all be deployed through an endoscope.
    • Chemoablation
      • may be employed either through retrograde ureteral catheter instillation or percutaneous access with fluoroscopic imaging guidance
    • Ureteral access sheath
      • Prior to placement of any ureteral access sheath, the entire ureter should be directly visualized in order to avoid missing any luminal neoplasms, especially in the distal ureter
      • Advantages
        • Allows for repeated scope passage up and down the ureter for sampling
        • Means of fluid egress from the upper tract to avoid excess pelvicalyceal hydrostatic pressure from irrigation solutions
        • Observational study found that use associated with lower rate of intravesical recurrence
  • Adjuvant therapy
    • Pelvicalyceal or intravesical chemotherapy
      • Considered an optional part of routine practice following ablation of UTUC tumors and after confirming there is no perforation of the bladder or upper tract
      • Principle of an immediate instillation of intravesical or pyelocaliceal (upper tract) chemotherapy at the time of endoscopic tumor ablation for UTUC is undertaken by extrapolation of the data supporting immediate instillation of intravesical chemotherapy at the time of transurethral resection of a bladder tumor
      • Approaches
        • Antegrade perfusion by nephrostomy tube
        • Retrograde perfusion via ureteral catheter,
        • Bladder instillation by transurethral catheter with reflux via a double J ureteral stent.
          • In the third scenario, it is recommended to perform a cystogram and demonstrate adequate reflux of contrast into the pyelocaliceal system.
      • Pelvicalyceal BCG
        • May be offered to patients with HR favorable UTUC after complete tumor ablation or patients with upper tract carcinoma in situ (CIS).
        • Consists of a 6-week induction course of BCG
        • Imperative indications
          • Solitary kidney status
          • Bilateral UTUC
          • RIsk of progression to end-stage renal disease
  • Repeat endoscopic evaluation
    • Proclivity of UTUC to recur and for residual disease to remain after the first ablation
    • Should be performed within three months
      • A 30-day window on either side of this endpoint (i.e., 30 to 90 days) is justified to allow timely identification of recurrences and may be dictated by aspects such as tumor size, visualization, access, treatment efficacy, etc., as clinically indicated
    • Repeat endoscopic assessment should occur within three-month intervals until no evidence of upper tract disease is identified.
  • When tumor ablation is not feasible or evidence of risk group progression is identified in patients with LR UTUC, surgical resection of all involved sites either by RNU or segmental resection of the ureter should be offered.

Surgical management

• RNU or SU is recommended for surgically eligible patients with HR UTUC
  • RNU with complete bladder cuff excision (BCE) and lymphadenectomy is the standard of care for patients with HR UTUC.

Radical nephroureterectomy

• Principles
  • Complete excision of ipsilateral upper tract urothelium, including the intramural portion of the ureter and ureteral orifice with negative margins
  • Avoidance of urinary spillage, such as by early low ligation of the ureter, to minimize the risk of seeding urothelial cancer outside the urinary tract.
• Bladder cuff excision
  • Worse local and metastatic recurrence rates with associated decreased CSS and OS for patients who did not receive complete BCE.
  • Approach
    • Extravesical or transvesical l (e.g., midline cystotomy)
    • Open, minimally invasive or transurethral endoscopic techniques.
      • Transurethral endoscopic approaches are associated with higher recurrence rates in the bladder and may limit the ability to utilize post-NU intravesical therapies if the bladder is not fully closed
• Specimen should be removed en bloc whenever technically feasible
• Open, robotic, and laparoscopic approaches are suitable
  • Minimally invasive approaches were associated with favorable perioperative outcomes including shorter length of stay and fewer complications, and, therefore, are favored for most patients when principles of RNU can be maintained
  • Consider open surgical approaches for large, bulky UTUC with clinical evidence for direct invasion to adjacent structures
• Complication rates following RNU range from 15% to 50% including a 30-day mortality risk of 1%

Ureterectomy

• Options
  • Segmental ureterectomy with ureteroureterostomy
    • Small, unifocal tumors (typically 1 cm or smaller) tumors isolated to a short segment of the proximal or mid-ureter requiring resection of 2 cm or less of ureteral length to allow for primary ureteroureterostomy.
      • Longer sections of ureteral involvement and resection may require more complex reconstruction techniques when kidney sparing is desired.
  • Distal ureterectomy with ureteral reimplant
    • Most favorable candidates for distal ureterectomy are patients who have ureteral tumors in the lower third of the ureter and a sufficiently mobile bladder with capacity to facilitate reimplantation with or without reconfiguration of the bladder to facilitate a tension-free anastomosis (i.e., Boari flap or psoas hitch maneuver).
• Reasonable alternatives to RNU for well-selected patients
  • Distal ureterectomy and ureteral reimplantation is the preferred treatment for surgically eligible patients with HR and unfavorable LR cancers endoscopically confirmed as confined to the lower ureter in a functional renal unit
    • Other approaches such as endoscopic assisted tumor ablation are considered alternative options to the gold-standard of extirpative resection
      • These approaches may yield less optimal results and require multiple additional procedures
• Principles
  • Patient counseling to describe techniques, potential requirements for urinary reconstruction and associated complications including the potential impact on postoperative bladder function.
  • Preoperative endoscopic assessment to evaluate sites of involvement and proximal extent of disease.
  • Preoperative assessment of bladder capacity and function in cases where more extensive reconstruction such as a Boari flap are anticipated to permit a tension free ureterovesical anastomosis or the use of bowel segments.
  • Intraoperative pathologic assessment (i.e., frozen sections) of proximal and distal margins to ensure complete resection with negative margins.
  • Reasonable attempts to avoid of spillage of urine into the surgical field.
  • Watertight, tension free closure to facilitate functional healing and avoid urine leak (of urine potentially contaminated with malignant cells).

• When performing NU or distal ureterectomy, the entire distal ureter including the intramural ureteral tunnel and ureteral orifice should be excised, and the urinary tract should be closed in a watertight fashion.
  • The resultant hiatus in the bladder in the location of the excised ureteral orifice with or without the bladder cuff can be closed formally in a watertight fashion in one or more layers
    • Delayed closure by secondary intension in a decompressed bladder without formal bladder closure has also been described.
    • A formal BCE with watertight closure of the bladder cuff should be performed to
      • Avoid urinary extravasation from the bladder
      • Facilitate more rapid catheter removal
      • Permit instillation of intravesical adjuvant chemotherapy in the perioperative setting
• In patients undergoing RNU or SU (including distal ureterectomy) for UTUC, a single dose of perioperative intravesical chemotherapy should be administered in eligible patients to reduce the risk of bladder recurrence.
  • The exact timing of therapy has varied including instilling intravesical chemotherapy at the time of catheter removal (ODMIT-C trial), while other retrospective series reported instillation during surgery or up to 48 hours postoperatively.
  • Little data to support one intravesical chemotherapeutic over another.
    • Many use gemcitabine over mitomycin due to risks of chemical peritonitis with extravesical extravasation of MMC

Lymph node dissection

• If HR UTUC, LND recommended
  • No RCTs to evaluate the effect of LND on oncologic outcomes in patients undergoing NU or SU
  • There is sufficient non-randomized evidence to suggest an oncologic benefit to LND at the time of NU for patients with “HR” stratification by guidelines
  • Recommended minimal templates in non-metastatic disease
    • Tumors in the pyelocaliceal system: lymph nodes of the ipsilateral great vessel extending from the renal hilum to at least the inferior mesenteric artery.
    • Tumors in the proximal 2/3 of the ureter: lymph nodes of the ipsilateral great vessel extending from the renal hilum to the aortic bifurcation.
    • Tumors in the distal 1/3 of the ureter: ipsilateral pelvic LND to include at minimum the obturator and external iliac nodal packets.
    • Internal and common iliac nodal packets may be removed in the appropriate clinical setting.
    • Limited data suggest cranial migration of lymph node metastases to the ipsilateral great vessels such that higher dissection may be considered in the appropriate clinical setting and per clinician judgement
• If LR UTUC, LND optional
  • Limited evidence exists to support a beneficial role for LND at time of NU or ureterectomy among patients with LR UTUC

Neoadjuvant/Adjuvant Chemotherapy and Immunotherapy

Neoadjuvant chemotherapy

• Cisplatin-based neoadjuvant chemotherapy should be offered to patients undergoing RNU or ureterectomy with HR UTUC, particularly in those patients whose post-operative eGFR is expected to be <60 mL/min/1.73m2 or those with other medical comorbidities that would preclude platinum-based chemotherapy in the post-operative setting.
  • The strongly positive data from these phase II trials, the established high-level evidence seen in bladder cancer trials, the consistent findings from pooled meta-analytic data, and the compelling clinical challenges imposed by post-RNU renal function on cis-platinum eligibility support the standard use of NAC regimens for HR UTUC.
• In the neoadjuvant setting, dosing regimens may be better tolerated, allowing more courses to be completed, and permitting patients to proceed to appropriate surgical intervention.
• Alternatives to cisplatin-based chemotherapy (i.e., immune checkpoint inhibitors, carboplatin, antibody drug conjugates, targeted FGFR therapies) are not recommended in the neoadjuvant setting (prior RNU or ureterectomy) outside of clinical trials

Adjuvant chemotherapy

• Platinum-based adjuvant chemotherapy should be offered to patients with advanced pathological stage (pT2–T4 pN0–N3 M0 or pTany N1–3 M0) UTUC after RNU or ureterectomy who have not received neoadjuvant platinum-based therapy
  • Adjuvant platinum-based chemotherapy for select patients with UTUC post-RNU is a standard based on results from the randomized phase III POUT trial.
    • Subjects in the adjuvant chemotherapy arm had improved DFS and lower risk of metastases or death, compared with those on observation.
    • A subgroup analysis demonstrated that outcomes for patients with lymph node involvement and those treated with carboplatin chemotherapy were worse than those without positive nodes or treated with cisplatin chemotherapy
    • Carboplatin remains a reasonable choice for HR cisplatin-ineligible patients post-RNU if NAC was not given

Adjuvant immunotherapy

• Adjuvant nivolumab therapy may be offered to patients who received neoadjuvant platinum-based chemotherapy (ypT2–T4 or ypN+) or who are ineligible for or refuse perioperative cisplatin (pT3, pT4a, or pN+)
  • CheckMate 274 evaluated adjuvant nivolumab following surgery in patients with HR non-metastatic urothelial carcinoma
    • Majority of patients underwent radical cystectomy for bladder primaries, 20% of patients underwent surgery for UTUC
    • Inclusion criteria for both studies were patients with HR urothelial cancer defined as pT3, pT4a, or pN+ for patients who had not received neoadjuvant cisplatin-based chemotherapy and ypT2 to ypT4a or ypN+ for patients who had received neoadjuvant cisplatin
    • Adjuvant nivolumab approved for UTUC and urothelial carcinoma of the bladder in patients with advanced disease identified from post-surgical pathology findings
  • Adjuvant platinum-chemotherapy over adjuvant nivolumab is recommended for eligible patients who did not receive NAC. Scenarios for use of adjuvant nivolumab include:
    • Patients with contraindications to platinum-based chemotherapy (e.g., poor renal function, performance status, sensorineural hearing loss, neuropathy or congestive heart failure, allergy)
    • Patients with HR pathology after NAC
    • Patients who refuse standard forms of adjuvant chemotherapy after appropriate counseling.

Watchful waiting

• Clinicians may offer watchful waiting or surveillance alone to select patients with UTUC with significant comorbidities, competing risks of mortality, or at significant risk of End-Stage Renal Disease (ESRD) with any intervention resulting in dialysis.
  • Discussion of treatment related risks including perioperative mortality may lead to a shared decision to proceed with active surveillance (whereby periodic assessments such as imaging or limited endoscopic assessment are performed) or watchful waiting/expectant management, where interventions are limited to palliation or awaiting symptomatic progression – especially in those with very limited life expectancy. In such cases, patients and family should be counseled and prepared for disease-related events such as bleeding, obstruction, infection, and pain with options for palliation that may be limited.

Advanced disease

• Clinical, regional node-positive (N+)
  • Should initially be treated with systemic therapy.
  • Consolidative RNU or ureterectomy with lymph-node dissection may be performed in those with a partial or complete response.
    • Pooled data from comparative outcomes utilizing NAC in patients with clinically node positive (cN+) disease supports this approach.
• Distant metastatic disease (M+)
  • Systemic therapy and alternative approaches (i.e., radiotherapy with or without chemotherapy in selected cases) should be favored for inoperable or symptomatic patients with M+ UTUC
  • RNU or ureterectomy should not be offered as initial therapy
    • Oncologic outcomes in the metastatic setting are strongly determined by response to systemic therapy, and surgical treatment has no demonstrable therapeutic efficacy for cytoreduction or as a single modality in this setting.
• Unresectable UTUC
  • Localized disease may be deemed unresectable or ineligible for extirpative surgical management due to significant medical comorbidities or other factors including refusal to accept surgical treatment (e.g., solitary kidney).
  • Should be offered a clinical trial or best supportive care including palliative management (radiation, systemic approach, endoscopic, or ablative) for refractory symptoms such as hematuria.
    • Formulating alternative care options should be approached with multi-disciplinary input with a focus on realistic goals of care such as providing means of local control for functional preservation (e.g., renal function) and palliation (e.g., bleeding, infection)
    • Multi-modal approaches include combination of endoscopic management to maintain upper and lower tract function (e.g., stents, nephrostomies, ablation for bleeding and local control) in addition to systemic treatment options if available. Rarely, radiation, angioembolization, or percutaneous ablation for palliation of bleeding can be offered

Special scenarios

CIS limited to the region within the ureteral orifice

• Topical therapies such as BCG along with refluxing ureteral stenting that has been used for in cases of CIS near the ureterovesical junction or transurethral resection of the transmural portion of the ureter for very distal tumors, as an extension of bladder resection procedures, when tumor is limited to the region inside the ureteral orifice and not beyond the bladder wall, thus anatomically managed as bladder cancer

Surveillance and Survivorship

Post-Treatment Surveillance

Surveillance after kidney sparing

• Low-risk patients managed with kidney sparing treatment
  • should undergo a follow-up cystoscopy and upper tract endoscopy within one to three months to confirm successful treatment. Once confirmed, these patients should undergo continued cystoscopic surveillance of the bladder at least every six to nine months for the first two years and then at least annually thereafter. Endoscopy should be repeated at six months and one year. Upper tract imaging should be performed at least every six to nine months for two years, then annually up to five years. surveillance after five years in the absence of recurrence should be based on shared decision�making between the patient and clinician.
• High-risk patients managed with kidney sparing treatment
  • Should undergo a follow-up cystoscopy and upper tract endoscopy with cytology within one to three months. Patients with no evidence of disease should undergo cystoscopic surveillance of the bladder and cytology at least every three to six months for the first three years and then at least annually thereafter. Endoscopy should be repeated at least at six months and one year. Upper tract imaging should be performed every three to six months for three years, then annually up to five years. surveillance after five years in the absence of recurrence should be encouraged and based on shared decision-making between the patient and clinician.
• Patients who develop urothelial recurrence in the bladder or urethra or positive cytology following treatment for UTUC should be evaluated for possible ipsilateral recurrence or development of new contralateral upper tract disease

Surveillance after radical NU

• After NU, patients with <pT2 N0/M0 disease should undergo surveillance with cystoscopy and cytology within three months after surgery, then repeated based on pathologic grade. For LG this should repeated at least every six to nine months for the first two years and then at least annually thereafter. For HG, this should be repeated at least every three to six months for the first three years and then at least annually thereafter. Due to the metastasis risk and estimated 5% probability for contralateral disease, cross-sectional imaging of the abdomen and pelvis should be done within 6 months after surgery and then at least annually for a minimum of 5 years. Surveillance after five years in the absence of recurrence should be encouraged and based on shared decision�making between the patient and clinician (See Table 6)
• T2+ managed with NU
  • For Patients who have undergone NU for >pT2 Nx/0 disease, a clinician should perform surveillance cystoscopy with cytology at three months after surgery, then every three to six months for 3 years, and then annually thereafter. Cross-sectional imaging of the abdomen and pelvis with multiphasic contrast-enhanced CT urography should be performed every three to six months for years one and two, every six months at year three, and annually thereafter to year five. A clinician should perform chest imaging, preferably with chest CT, every 6-12 months for the first 5 years. Beyond five years after surgery in patients without recurrence, ongoing surveillance with cystoscopy and upper tract imaging may be continued on an annual basis according to principles of shared/informed decision-making

Survivorship

• For patients with reduced or deteriorating renal function following NU or other intervention, clinicians should consider referral to nephrology.
  • With significant nephron mass loss, hyperfiltration can occur resulting in glomerular damage, exacerbation of proteinuria and progressive sclerosis with further decline in GFR. Therefore, repeat assessment of blood pressure, eGFR, and proteinuria should be performed soon after nephrectomy then again in three to six months to assess for development or progression of CKD. With any compromise in eGFR or presence of CKD complications, additional regular monitoring of kidney function should be performed and further management of CKD would be recommended with referral to nephrology. Careful management of DM and HTN and avoidance of substantial weight gain may slow or prevent CKD progression and should be prioritized on a long-term basisd
• Clinicians should discuss disease-related stresses and risk factors and encourage patients with urothelial cancer to adopt healthy lifestyle habits, including smoking cessation, exercise, and a healthy diet, to promote long-term health benefits and quality of life.

References

1. Coleman, Jonathan A., et al. "Diagnosis and Management of Non-Metastatic Upper Tract Urothelial Carcinoma: AUA/SUO Guideline." The Journal of Urology 209.6 (2023): 1071-1081.