Wilms Tumor and Other Childhood Kidney Tumors Treatment (PDQ®)–Health Professional Version
Nephroblastomatosis
General Information About Nephroblastomatosis (Diffuse Hyperplastic Perilobar Nephroblastomatosis)
Some multifocal nephrogenic rests may become hyperplastic, which may produce a thick rind of blastemal or tubular cells that enlarge the kidney. Radiological studies may be helpful in making the difficult distinction between diffuse hyperplastic perilobar nephroblastomatosis and Wilms tumor. On magnetic resonance imaging, nephrogenic rests appear homogeneous and hypointense with contrast, whereas Wilms tumor has mixed echogenicity and inhomogeneous appearance. Incisional biopsies are difficult to interpret, and it is essential that the biopsy includes the juncture between the lesion and surrounding renal parenchyma.[1] Differentiation may occur after chemotherapy is administered.
Treatment of Nephroblastomatosis (Diffuse Hyperplastic Perilobar Nephroblastomatosis)
Treatment options for diffuse hyperplastic perilobar nephroblastomatosis include the following:
- Preoperative chemotherapy.
- Renal-sparing surgery. Given the high incidence of bilaterality and subsequent Wilms tumors, renal-sparing surgery may be indicated.[1]
Evidence (preoperative chemotherapy and surgery):
- In a series of 52 patients with diffuse hyperplastic perilobar nephroblastomatosis, 33 patients were treated with chemotherapy and/or radiation therapy initially, 16 patients underwent unilateral nephrectomy, and 3 patients were observed only.[1]
- A total of 24 patients developed Wilms tumor (including the 3 patients who were observed only), at a median of 30 months.
- Eighteen of the 33 patients who received adjuvant chemotherapy alone developed a Wilms tumor.
- Of 16 patients who underwent a nephrectomy and adjuvant therapy, 3 developed Wilms tumor, despite the fact that 14 of 16 patients had bilateral disease.
- Thirty-three percent of the patients who developed Wilms tumor had anaplastic Wilms tumor at some time during their course, probably as a result of selection of chemotherapy-resistant tumors; thus, early detection is critical.
On the basis of this report, it is recommended that patients with diffuse hyperplastic perilobar nephroblastomatosis are monitored by imaging at a maximum interval of 3 months, for a minimum of 7 years; complete resection of growing lesions should be strongly considered because of this high incidence of anaplasia after chemotherapy.[1]
References
- Perlman EJ, Faria P, Soares A, et al.: Hyperplastic perilobar nephroblastomatosis: long-term survival of 52 patients. Pediatr Blood Cancer 46 (2): 203-21, 2006. [PUBMED Abstract]
Treatment of Recurrent Childhood Kidney Tumors
Patients with recurrent rhabdoid tumor of the kidney, clear cell sarcoma of the kidney, neuroepithelial tumor of the kidney, and renal cell carcinoma should be considered for treatment on available phase I and phase II clinical trials.
Regardless of whether a decision is made to pursue disease-directed therapy at the time of progression, palliative care remains a central focus of management. This ensures that quality of life is maximized while attempting to reduce symptoms and stress related to the terminal illness.
Table 9 describes the treatment options for recurrent childhood kidney tumors.
Prognosis, Prognostic Factors, and Risk Categories for Recurrent Wilms Tumor
Approximately 15% of patients with favorable histology (FH) Wilms tumor and 50% of patients with anaplastic histology Wilms tumor experience recurrence.[1] The most common site of relapse is lung, followed by abdomen/flank and liver. Recurrence in the brain (0.5%) or bone is rare in children with Wilms tumor.[2,3] Historically, the salvage rate for patients with recurrent FH Wilms tumor was 25% to 40%. As a result of modern treatment combinations, the outcome after recurrence has improved up to 60%.[4,5]
A number of potential prognostic features influencing postrecurrence outcome have been analyzed, but it is difficult to determine whether these factors are independent of each other. Also, the following prognostic factors appear to be changing as therapy for primary and recurrent Wilms tumor evolves:
The National Wilms Tumor Study (NWTS)-5 trial (NWTS-5 [COG-Q9401/NCT00002611]) showed that time to recurrence and site of recurrence are no longer prognostically significant.[4,7] However, in an International Society of Pediatric Oncology (SIOP) study, patients who experienced a pulmonary relapse within 12 months of diagnosis had a poorer prognosis (5-year overall survival [OS] rate, 47%) than did patients who experienced a pulmonary relapse 12 months or more after diagnosis (5-year OS rate, 75%).[8]
On the basis of these results, the following three risk categories have been identified:
- Standard risk: Patients with FH Wilms tumor who relapse after therapy with only vincristine and/or dactinomycin. These patients are expected to have an event-free survival (EFS) rate of 70% to 80%.[5] This group represents approximately 30% of recurrences.
- High risk: Patients with FH Wilms tumor who relapse after therapy with three or more agents. These patients account for 45% to 50% of children with Wilms tumor who relapse and have survival rates in the 40% to 50% range.[5]
- Very high risk: Patients with recurrent anaplastic or blastemal-predominant Wilms tumor. These patients are expected to have survival rates in the 10% range, and they experience 10% to 15% of all Wilms tumor relapses.[5,9]
Treatment of Standard-Risk Relapsed Wilms Tumor
In children who had small stage I Wilms tumor and were treated with surgery alone, the EFS rate was 84%. All but one child who relapsed was salvaged with treatment tailored to the site of recurrence.[7,10]
Successful retreatment can be accomplished for Wilms tumor patients whose initial therapy consisted of immediate nephrectomy followed by chemotherapy with vincristine and dactinomycin and who relapse.
Treatment options for standard-risk relapsed Wilms tumor include the following:
Surgery, radiation therapy, and chemotherapy
Evidence (surgery, radiation therapy, and chemotherapy):
- Fifty-eight patients were treated on the NWTS-5 relapse protocol with surgical excision when feasible, radiation therapy, and alternating courses of vincristine, doxorubicin, and cyclophosphamide; and etoposide and cyclophosphamide.[7]
- The 4-year EFS rate after relapse was 71%, and the OS rate was 82%.
- For patients whose site of relapse was only the lungs, the 4-year EFS rate was 68%, and the OS rate was 81%.
Treatment of High-Risk and Very High-Risk Relapsed Wilms Tumor
Treatment options for high-risk and very high-risk relapsed Wilms tumor include the following:
Chemotherapy, surgery, and/or radiation therapy
Evidence (chemotherapy, surgery, and/or radiation therapy):
- Approximately 50% of unilateral Wilms tumor patients who relapse or progress after initial treatment with vincristine, dactinomycin, and doxorubicin and radiation therapy can be successfully re-treated. Sixty patients with unilateral Wilms tumor were treated on the NWTS-5 relapse protocol with alternating courses of cyclophosphamide/etoposide and carboplatin/etoposide, surgery, and radiation therapy.[4][Level of evidence: 2A]
- The 4-year EFS rate for patients with high-risk Wilms tumor was 42%, and the OS rate was 48%.
- High-risk patients who relapsed in the lungs only had a 4-year EFS rate of 49% and an OS rate of 53%.
HSCT
High-dose chemotherapy followed by autologous HSCT has been utilized for recurrent high-risk patients.[12,13]; [14][Level of evidence: 3ii]
Evidence (HSCT):
- The outcomes of 253 patients with relapsed Wilms tumor who received high-dose chemotherapy followed by autologous HSCT between 1990 and 2013 were reported to and reviewed by the Center for International Blood and Marrow Transplantation Research.[15]
- The 5-year estimate for EFS was 36%, and the 5-year estimate for OS was 45%.
- Relapse of primary disease was the cause of death in 81% of the population.
- In a single-institution series of 24 patients with relapsed and refractory Wilms tumor who were treated with high-dose chemotherapy followed by autologous stem cell rescue (HD-ASCR), the following results were reported:[14][Level of evidence: 3ii]
- The 3-year and 5-year disease-free survival rates were 46% and 60%, respectively, and OS rates were 40% and 54%, respectively, which is similar to those reported for conventional salvage therapies.
- No survival advantage was identified on the basis of time to relapse, disease state at time of HD-ASCR, initial stage, or site of relapse.
- No difference was found on the basis of age of diagnosis, sex, histology, or treatment with one versus two cycles of HD-ASCR.
No randomized trials of chemotherapy versus transplant have been reported, and case series suffer from selection bias.
Patients in whom such salvage attempts fail should be offered treatment on available phase I or phase II studies.
Treatment Options Under Clinical Evaluation for Recurrent Wilms Tumor
Information about National Cancer Institute (NCI)–supported clinical trials can be found on the NCI website. For information about clinical trials sponsored by other organizations, refer to the ClinicalTrials.gov website.
The following is an example of a national and/or institutional clinical trials that are currently being conducted:
- APEC1621 (NCT03155620) (Pediatric MATCH: Targeted Therapy Directed by Genetic Testing in Treating Pediatric Patients with Relapsed or Refractory Advanced Solid Tumors, Non-Hodgkin Lymphomas, or Histiocytic Disorders): NCI-COG Pediatric Molecular Analysis for Therapeutic Choice (MATCH), referred to as Pediatric MATCH, will match targeted agents with specific molecular changes identified using a next-generation sequencing targeted assay of more than 4,000 different mutations across more than 160 genes in refractory and recurrent solid tumors. Children and adolescents aged 1 to 21 years are eligible for the trial.Tumor tissue from progressive or recurrent disease must be available for molecular characterization. Patients with tumors that have molecular variants addressed by treatment arms included in the trial will be offered treatment on Pediatric MATCH. Additional information can be obtained on the NCI website and ClinicalTrials.gov website.
Treatment of Recurrent Clear Cell Sarcoma of the Kidney
Clear cell sarcoma of the kidney has been characterized by late relapses. However, in trials after 1992, most relapses occurred within 3 years, and the most common sites of recurrence were the brain and the lungs.[16,17] In a series of 37 patients with clear cell sarcoma of the kidney who relapsed, the 5-year EFS rate after relapse was 18%, and the OS rate after relapse was 26%.[17]
The optimal treatment of relapsed clear cell sarcoma of the kidney has not been established. Treatment of patients with recurrent clear cell sarcoma of the kidney depends on initial therapy and site of recurrence.
Treatment options for recurrent clear cell sarcoma of the kidney include the following:
- Chemotherapy, complete surgical resection (if possible), and/or radiation therapy.
Cyclophosphamide and carboplatin should be considered if not used initially. Patients with recurrent clear cell sarcoma of the kidney, in some cases involving the brain, have responded to treatment with ifosfamide, carboplatin, and etoposide (ICE) coupled with local control consisting of surgical resection, radiation therapy, or both.[17]; [18][Level of evidence: 2A]
The use of high-dose chemotherapy followed by HSCT is undefined in patients with recurrent clear cell sarcoma of the kidney. A total of 24 patients with relapsed clear cell sarcoma of the kidney received high-dose chemotherapy followed by autologous HSCT. Of those patients, 12 (50%) were alive without disease after a median of 52 months. It should be noted that patients who had already achieved a second complete remission were more likely to receive high-dose chemotherapy.[13,17,18]
Treatment options under clinical evaluation for recurrent clear cell sarcoma of the kidney
Information about NCI-supported clinical trials can be found on the NCI website. For information about clinical trials sponsored by other organizations, refer to the ClinicalTrials.gov website.
The following is an example of a national and/or institutional clinical trial that is currently being conducted:
- APEC1621 (NCT03155620) (Pediatric MATCH: Targeted Therapy Directed by Genetic Testing in Treating Pediatric Patients with Relapsed or Refractory Advanced Solid Tumors, Non-Hodgkin Lymphomas, or Histiocytic Disorders): NCI-COG Pediatric Molecular Analysis for Therapeutic Choice (MATCH), referred to as Pediatric MATCH, will match targeted agents with specific molecular changes identified using a next-generation sequencing targeted assay of more than 4,000 different mutations across more than 160 genes in refractory and recurrent solid tumors. Children and adolescents aged 1 to 21 years are eligible for the trial.Tumor tissue from progressive or recurrent disease must be available for molecular characterization. Patients with tumors that have molecular variants addressed by treatment arms included in the trial will be offered treatment on Pediatric MATCH. Additional information can be obtained on the NCI website and ClinicalTrials.gov website.
Treatment of Recurrent Congenital Mesoblastic Nephroma
Relapses were reported in 4% of patients with congenital mesoblastic nephroma, and all relapses occurred within 12 months after diagnosis. Most relapses occur locally, although metastatic relapses have been reported.[19] About 70% of patients who relapsed survived with individualized treatment comprising combinations of surgery, chemotherapy, and radiation therapy.[19]
Targeted therapy should be considered for patients with recurrent or refractory disease containing the ETV6-NTRK3 fusion. Larotrectinib and entrectinib are NTRK inhibitors that are approved for adult and pediatric patients with solid tumors that have an NTRK gene fusion without a known acquired resistance mutation, who are either metastatic or when surgical resection is likely to result in severe morbidity, and who have no satisfactory alternative treatments or whose cancer has progressed after treatment.[20,21]
Treatment options under clinical evaluation for recurrent congenital mesoblastic nephroma
Information about NCI-supported clinical trials can be found on the NCI website. For information about clinical trials sponsored by other organizations, refer to the ClinicalTrials.gov website.
The following are examples of national and/or institutional clinical trials that are currently being conducted:
- APEC1621 (NCT03155620) (Pediatric MATCH: Targeted Therapy Directed by Genetic Testing in Treating Pediatric Patients with Relapsed or Refractory Advanced Solid Tumors, Non-Hodgkin Lymphomas, or Histiocytic Disorders): NCI-COG Pediatric Molecular Analysis for Therapeutic Choice (MATCH), referred to as Pediatric MATCH, will match targeted agents with specific molecular changes identified using a next-generation sequencing targeted assay of more than 4,000 different mutations across more than 160 genes in refractory and recurrent solid tumors. Children and adolescents aged 1 to 21 years are eligible for the trial.Tumor tissue from progressive or recurrent disease must be available for molecular characterization. Patients with tumors that have molecular variants addressed by treatment arms included in the trial will be offered treatment on Pediatric MATCH. Additional information can be obtained on the NCI website and ClinicalTrials.gov website.The cellular subtype of congenital mesoblastic nephroma, which commonly harbors the ETV6-NTRK3 fusion, is associated with relapsed disease. Patients should consider enrolling on this trial because one of the treatment arms (APEC1621A [NCT03213704]) uses larotrectinib, which inhibits NTRK fusions.
- LOXO-TRK-15003 (NCT02637687) (Oral TRK Inhibitor LOXO-101 for Treatment of Advanced Pediatric Solid or Primary Central Nervous System [CNS] Tumors): This is a multicenter, open-label, phase I study of pediatric patients with advanced solid or primary CNS tumors. LOXO-101 will be administered orally twice daily, with the dose adjusted by body surface area.
- RXDX-101-03 (NCT02650401) (Study of RXDX-101 in Children With Recurrent or Refractory Solid Tumors and Primary CNS Tumors): This is a four-part, open-label, phase I/Ib, dose-escalation study in pediatric patients with relapsed or refractory solid tumors, primary CNS tumors, neuroblastoma, and non-neuroblastoma, extracranial solid tumors with NTRK1/2/3, ROS1, or ALK gene rearrangements. The study is designed to explore the safety, maximum tolerated dose or recommended phase II dose, pharmacokinetics, and antitumor activity of entrectinib (RXDX-101).
Current Clinical Trials
Use our advanced clinical trial search to find NCI-supported cancer clinical trials that are now enrolling patients. The search can be narrowed by location of the trial, type of treatment, name of the drug, and other criteria. General information about clinical trials is also available.
References
- Green DM, Breslow NE, Beckwith JB, et al.: Effect of duration of treatment on treatment outcome and cost of treatment for Wilms' tumor: a report from the National Wilms' Tumor Study Group. J Clin Oncol 16 (12): 3744-51, 1998. [PUBMED Abstract]
- Venkatramani R, Chi YY, Coppes MJ, et al.: Outcome of patients with intracranial relapse enrolled on national Wilms Tumor Study Group clinical trials. Pediatr Blood Cancer 64 (7): , 2017. [PUBMED Abstract]
- Iaboni DSM, Chi YY, Kim Y, et al.: Outcome of Wilms tumor patients with bone metastasis enrolled on National Wilms Tumor Studies 1-5: A report from the Children's Oncology Group. Pediatr Blood Cancer 66 (1): e27430, 2019. [PUBMED Abstract]
- Malogolowkin M, Cotton CA, Green DM, et al.: Treatment of Wilms tumor relapsing after initial treatment with vincristine, actinomycin D, and doxorubicin. A report from the National Wilms Tumor Study Group. Pediatr Blood Cancer 50 (2): 236-41, 2008. [PUBMED Abstract]
- Reinhard H, Schmidt A, Furtwängler R, et al.: Outcome of relapses of nephroblastoma in patients registered in the SIOP/GPOH trials and studies. Oncol Rep 20 (2): 463-7, 2008. [PUBMED Abstract]
- Grundy P, Breslow N, Green DM, et al.: Prognostic factors for children with recurrent Wilms' tumor: results from the Second and Third National Wilms' Tumor Study. J Clin Oncol 7 (5): 638-47, 1989. [PUBMED Abstract]
- Green DM, Cotton CA, Malogolowkin M, et al.: Treatment of Wilms tumor relapsing after initial treatment with vincristine and actinomycin D: a report from the National Wilms Tumor Study Group. Pediatr Blood Cancer 48 (5): 493-9, 2007. [PUBMED Abstract]
- Warmann SW, Furtwängler R, Blumenstock G, et al.: Tumor biology influences the prognosis of nephroblastoma patients with primary pulmonary metastases: results from SIOP 93-01/GPOH and SIOP 2001/GPOH. Ann Surg 254 (1): 155-62, 2011. [PUBMED Abstract]
- Dome JS, Cotton CA, Perlman EJ, et al.: Treatment of anaplastic histology Wilms' tumor: results from the fifth National Wilms' Tumor Study. J Clin Oncol 24 (15): 2352-8, 2006. [PUBMED Abstract]
- Shamberger RC, Anderson JR, Breslow NE, et al.: Long-term outcomes for infants with very low risk Wilms tumor treated with surgery alone in National Wilms Tumor Study-5. Ann Surg 251 (3): 555-8, 2010. [PUBMED Abstract]
- Abu-Ghosh AM, Krailo MD, Goldman SC, et al.: Ifosfamide, carboplatin and etoposide in children with poor-risk relapsed Wilms' tumor: a Children's Cancer Group report. Ann Oncol 13 (3): 460-9, 2002. [PUBMED Abstract]
- Garaventa A, Hartmann O, Bernard JL, et al.: Autologous bone marrow transplantation for pediatric Wilms' tumor: the experience of the European Bone Marrow Transplantation Solid Tumor Registry. Med Pediatr Oncol 22 (1): 11-4, 1994. [PUBMED Abstract]
- Pein F, Michon J, Valteau-Couanet D, et al.: High-dose melphalan, etoposide, and carboplatin followed by autologous stem-cell rescue in pediatric high-risk recurrent Wilms' tumor: a French Society of Pediatric Oncology study. J Clin Oncol 16 (10): 3295-301, 1998. [PUBMED Abstract]
- Rossoff J, Tse WT, Duerst RE, et al.: High-dose chemotherapy and autologous hematopoietic stem-cell rescue for treatment of relapsed and refractory Wilms tumor: Re-evaluating outcomes. Pediatr Hematol Oncol 35 (5-6): 316-321, 2018 Aug - Sep. [PUBMED Abstract]
- Malogolowkin MH, Hemmer MT, Le-Rademacher J, et al.: Outcomes following autologous hematopoietic stem cell transplant for patients with relapsed Wilms' tumor: a CIBMTR retrospective analysis. Bone Marrow Transplant 52 (11): 1549-1555, 2017. [PUBMED Abstract]
- Seibel NL, Sun J, Anderson JR, et al.: Outcome of clear cell sarcoma of the kidney (CCSK) treated on the National Wilms Tumor Study-5 (NWTS). [Abstract] J Clin Oncol 24 (Suppl 18): A-9000, 502s, 2006.
- Gooskens SL, Furtwängler R, Spreafico F, et al.: Treatment and outcome of patients with relapsed clear cell sarcoma of the kidney: a combined SIOP and AIEOP study. Br J Cancer 111 (2): 227-33, 2014. [PUBMED Abstract]
- Radulescu VC, Gerrard M, Moertel C, et al.: Treatment of recurrent clear cell sarcoma of the kidney with brain metastasis. Pediatr Blood Cancer 50 (2): 246-9, 2008. [PUBMED Abstract]
- Gooskens SL, Houwing ME, Vujanic GM, et al.: Congenital mesoblastic nephroma 50 years after its recognition: A narrative review. Pediatr Blood Cancer 64 (7): , 2017. [PUBMED Abstract]
- Drilon A, Laetsch TW, Kummar S, et al.: Efficacy of Larotrectinib in TRK Fusion-Positive Cancers in Adults and Children. N Engl J Med 378 (8): 731-739, 2018. [PUBMED Abstract]
- Entrectinib Shows Pediatric Potential. Cancer Discov 9 (7): OF4, 2019. [PUBMED Abstract]
Special Considerations for the Treatment of Children With Cancer
Cancer in children and adolescents is rare, although the overall incidence of childhood cancer has been slowly increasing since 1975.[1] Children and adolescents with cancer need to be referred to medical centers that have multidisciplinary teams of cancer specialists with experience treating the cancers that occur during childhood and adolescence. This multidisciplinary team approach incorporates the skills of the following health care professionals and others to ensure that children receive treatment, supportive care, and rehabilitation that will achieve optimal survival and quality of life:
- Primary care physicians.
- Pediatric surgical subspecialists.
- Radiation oncologists.
- Pediatric medical oncologists/hematologists.
- Rehabilitation specialists.
- Pediatric nurse specialists.
- Social workers.
Refer to the PDQ summaries on Supportive and Palliative Care for specific information about supportive care for children and adolescents with cancer.
Guidelines for pediatric cancer centers and their role in the treatment of pediatric patients with cancer have been outlined by the American Academy of Pediatrics.[2] At these pediatric cancer centers, clinical trials are available for most of the types of cancer that occur in children and adolescents, and the opportunity to participate in these trials is offered to most patients and their families. Clinical trials for children and adolescents with cancer are generally designed to compare potentially better therapy with therapy that is currently accepted as standard. Most of the progress made in identifying curative therapies for childhood cancers has been achieved through clinical trials under the auspices of cooperative groups such as the Children's Oncology Group (COG) and the International Society of Pediatric Oncology (SIOP). Information about ongoing clinical trials is available from the NCI website.
References
- Smith MA, Seibel NL, Altekruse SF, et al.: Outcomes for children and adolescents with cancer: challenges for the twenty-first century. J Clin Oncol 28 (15): 2625-34, 2010. [PUBMED Abstract]
- Corrigan JJ, Feig SA; American Academy of Pediatrics: Guidelines for pediatric cancer centers. Pediatrics 113 (6): 1833-5, 2004. [PUBMED Abstract]
Changes to This Summary (01/09/2020)
The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.
This summary was comprehensively reviewed and extensively revised.
This summary is written and maintained by the PDQ Pediatric Treatment Editorial Board, which is editorially independent of NCI. The summary reflects an independent review of the literature and does not represent a policy statement of NCI or NIH. More information about summary policies and the role of the PDQ Editorial Boards in maintaining the PDQ summaries can be found on the About This PDQ Summary and PDQ® - NCI's Comprehensive Cancer Database pages.
About This PDQ Summary
Purpose of This Summary
This PDQ cancer information summary for health professionals provides comprehensive, peer-reviewed, evidence-based information about the treatment of Wilms tumor and other childhood kidney tumors. It is intended as a resource to inform and assist clinicians who care for cancer patients. It does not provide formal guidelines or recommendations for making health care decisions.
Reviewers and Updates
This summary is reviewed regularly and updated as necessary by the PDQ Pediatric Treatment Editorial Board, which is editorially independent of the National Cancer Institute (NCI). The summary reflects an independent review of the literature and does not represent a policy statement of NCI or the National Institutes of Health (NIH).
Board members review recently published articles each month to determine whether an article should:
- be discussed at a meeting,
- be cited with text, or
- replace or update an existing article that is already cited.
Changes to the summaries are made through a consensus process in which Board members evaluate the strength of the evidence in the published articles and determine how the article should be included in the summary.
The lead reviewers for Wilms Tumor and Other Childhood Kidney Tumors Treatment are:
- Louis S. Constine, MD (James P. Wilmot Cancer Center at University of Rochester Medical Center)
- Christopher N. Frantz, MD (Alfred I. duPont Hospital for Children)
- Andrea A. Hayes-Jordan, MD, FACS, FAAP (University of North Carolina - Chapel Hill School of Medicine)
- Nita Louise Seibel, MD (National Cancer Institute)
- Stephen J. Shochat, MD (St. Jude Children's Research Hospital)
Any comments or questions about the summary content should be submitted to Cancer.gov through the NCI website's Email Us. Do not contact the individual Board Members with questions or comments about the summaries. Board members will not respond to individual inquiries.
Levels of Evidence
Some of the reference citations in this summary are accompanied by a level-of-evidence designation. These designations are intended to help readers assess the strength of the evidence supporting the use of specific interventions or approaches. The PDQ Pediatric Treatment Editorial Board uses a formal evidence ranking system in developing its level-of-evidence designations.
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The preferred citation for this PDQ summary is:
PDQ® Pediatric Treatment Editorial Board. PDQ Wilms Tumor and Other Childhood Kidney Tumors Treatment. Bethesda, MD: National Cancer Institute. Updated <MM/DD/YYYY>. Available at: https://www.cancer.gov/types/kidney/hp/wilms-treatment-pdq. Accessed <MM/DD/YYYY>. [PMID: 26389282]
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