Bilateral Wilms tumors treated according to the Japan Wilms Tumor Study Group protocol

Background The introduction of multimodal therapy has improved the survival rate of bilateral Wilms tumors (BWT); however, the results are still not satisfactory in terms of the renal preservation. To establish a new treatment strategy for BWT, we reviewed the results of the cases registered in the...

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Published in:Pediatric blood & cancer Vol. 61; no. 7; pp. 1184 - 1189
Main Authors: Oue, Takaharu, Koshinaga, Tsugumichi, Okita, Hajime, Kaneko, Yasuhiko, Hinotsu, Shiro, Fukuzawa, Masahiro
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Abstract Background The introduction of multimodal therapy has improved the survival rate of bilateral Wilms tumors (BWT); however, the results are still not satisfactory in terms of the renal preservation. To establish a new treatment strategy for BWT, we reviewed the results of the cases registered in the Japan Wilms Tumor Study Group (JWiTS). Procedure This analysis concerned patients with synchronous BWT registered in the JWiTS between 1996 and 2011. In these patients, the management of BWT included initial tumor resection or biopsy followed by chemotherapy. The details of the treatments and outcomes were analyzed. Results Among the 355 cases registered in the JWiTS database, 31 (8.7%) had BWT. They were 16 males and 15 females with a mean age of 15.5 months. Preoperative chemotherapy was performed in 24 cases. Bilateral nephron‐sparing surgery (NSS) was achieved in 10 of 28 cases (36%). All of the cases were of favorable nephroblastoma without anaplasia, and a WT1 mutation was detected in 21 of the 27 cases (78%) examined. The 5‐year overall survival was 92.6%; however, 10 children (40%) developed impaired renal function and three of them developed renal failure. Conclusions The long‐term survival rates for patients with synchronous BWT have improved. However, more than half of patients receive nephrectomy. The protocol should be changed to improve the rate of preservation of the renal parenchyma. Preoperative chemotherapy should be performed to shrink the tumors in every case, and subsequent NSS should be carried out after a central imaging evaluation. Pediatr Blood Cancer 2014;61:1184–1189. © 2014 Wiley Periodicals, Inc.
AbstractList BACKGROUNDThe introduction of multimodal therapy has improved the survival rate of bilateral Wilms tumors (BWT); however, the results are still not satisfactory in terms of the renal preservation. To establish a new treatment strategy for BWT, we reviewed the results of the cases registered in the Japan Wilms Tumor Study Group (JWiTS).PROCEDUREThis analysis concerned patients with synchronous BWT registered in the JWiTS between 1996 and 2011. In these patients, the management of BWT included initial tumor resection or biopsy followed by chemotherapy. The details of the treatments and outcomes were analyzed.RESULTSAmong the 355 cases registered in the JWiTS database, 31 (8.7%) had BWT. They were 16 males and 15 females with a mean age of 15.5 months. Preoperative chemotherapy was performed in 24 cases. Bilateral nephron-sparing surgery (NSS) was achieved in 10 of 28 cases (36%). All of the cases were of favorable nephroblastoma without anaplasia, and a WT1 mutation was detected in 21 of the 27 cases (78%) examined. The 5-year overall survival was 92.6%; however, 10 children (40%) developed impaired renal function and three of them developed renal failure.CONCLUSIONSThe long-term survival rates for patients with synchronous BWT have improved. However, more than half of patients receive nephrectomy. The protocol should be changed to improve the rate of preservation of the renal parenchyma. Preoperative chemotherapy should be performed to shrink the tumors in every case, and subsequent NSS should be carried out after a central imaging evaluation.
The introduction of multimodal therapy has improved the survival rate of bilateral Wilms tumors (BWT); however, the results are still not satisfactory in terms of the renal preservation. To establish a new treatment strategy for BWT, we reviewed the results of the cases registered in the Japan Wilms Tumor Study Group (JWiTS). This analysis concerned patients with synchronous BWT registered in the JWiTS between 1996 and 2011. In these patients, the management of BWT included initial tumor resection or biopsy followed by chemotherapy. The details of the treatments and outcomes were analyzed. Among the 355 cases registered in the JWiTS database, 31 (8.7%) had BWT. They were 16 males and 15 females with a mean age of 15.5 months. Preoperative chemotherapy was performed in 24 cases. Bilateral nephron-sparing surgery (NSS) was achieved in 10 of 28 cases (36%). All of the cases were of favorable nephroblastoma without anaplasia, and a WT1 mutation was detected in 21 of the 27 cases (78%) examined. The 5-year overall survival was 92.6%; however, 10 children (40%) developed impaired renal function and three of them developed renal failure. The long-term survival rates for patients with synchronous BWT have improved. However, more than half of patients receive nephrectomy. The protocol should be changed to improve the rate of preservation of the renal parenchyma. Preoperative chemotherapy should be performed to shrink the tumors in every case, and subsequent NSS should be carried out after a central imaging evaluation.
Background The introduction of multimodal therapy has improved the survival rate of bilateral Wilms tumors (BWT); however, the results are still not satisfactory in terms of the renal preservation. To establish a new treatment strategy for BWT, we reviewed the results of the cases registered in the Japan Wilms Tumor Study Group (JWiTS). Procedure This analysis concerned patients with synchronous BWT registered in the JWiTS between 1996 and 2011. In these patients, the management of BWT included initial tumor resection or biopsy followed by chemotherapy. The details of the treatments and outcomes were analyzed. Results Among the 355 cases registered in the JWiTS database, 31 (8.7%) had BWT. They were 16 males and 15 females with a mean age of 15.5 months. Preoperative chemotherapy was performed in 24 cases. Bilateral nephron-sparing surgery (NSS) was achieved in 10 of 28 cases (36%). All of the cases were of favorable nephroblastoma without anaplasia, and a WT1 mutation was detected in 21 of the 27 cases (78%) examined. The 5-year overall survival was 92.6%; however, 10 children (40%) developed impaired renal function and three of them developed renal failure. Conclusions The long-term survival rates for patients with synchronous BWT have improved. However, more than half of patients receive nephrectomy. The protocol should be changed to improve the rate of preservation of the renal parenchyma. Preoperative chemotherapy should be performed to shrink the tumors in every case, and subsequent NSS should be carried out after a central imaging evaluation. Pediatr Blood Cancer 2014; 61:1184-1189.
Background The introduction of multimodal therapy has improved the survival rate of bilateral Wilms tumors (BWT); however, the results are still not satisfactory in terms of the renal preservation. To establish a new treatment strategy for BWT, we reviewed the results of the cases registered in the Japan Wilms Tumor Study Group (JWiTS). Procedure This analysis concerned patients with synchronous BWT registered in the JWiTS between 1996 and 2011. In these patients, the management of BWT included initial tumor resection or biopsy followed by chemotherapy. The details of the treatments and outcomes were analyzed. Results Among the 355 cases registered in the JWiTS database, 31 (8.7%) had BWT. They were 16 males and 15 females with a mean age of 15.5 months. Preoperative chemotherapy was performed in 24 cases. Bilateral nephron-sparing surgery (NSS) was achieved in 10 of 28 cases (36%). All of the cases were of favorable nephroblastoma without anaplasia, and a WT1 mutation was detected in 21 of the 27 cases (78%) examined. The 5-year overall survival was 92.6%; however, 10 children (40%) developed impaired renal function and three of them developed renal failure. Conclusions The long-term survival rates for patients with synchronous BWT have improved. However, more than half of patients receive nephrectomy. The protocol should be changed to improve the rate of preservation of the renal parenchyma. Preoperative chemotherapy should be performed to shrink the tumors in every case, and subsequent NSS should be carried out after a central imaging evaluation. Pediatr Blood Cancer 2014;61:1184-1189. © 2014 Wiley Periodicals, Inc.
Background The introduction of multimodal therapy has improved the survival rate of bilateral Wilms tumors (BWT); however, the results are still not satisfactory in terms of the renal preservation. To establish a new treatment strategy for BWT, we reviewed the results of the cases registered in the Japan Wilms Tumor Study Group (JWiTS). Procedure This analysis concerned patients with synchronous BWT registered in the JWiTS between 1996 and 2011. In these patients, the management of BWT included initial tumor resection or biopsy followed by chemotherapy. The details of the treatments and outcomes were analyzed. Results Among the 355 cases registered in the JWiTS database, 31 (8.7%) had BWT. They were 16 males and 15 females with a mean age of 15.5 months. Preoperative chemotherapy was performed in 24 cases. Bilateral nephron‐sparing surgery (NSS) was achieved in 10 of 28 cases (36%). All of the cases were of favorable nephroblastoma without anaplasia, and a WT1 mutation was detected in 21 of the 27 cases (78%) examined. The 5‐year overall survival was 92.6%; however, 10 children (40%) developed impaired renal function and three of them developed renal failure. Conclusions The long‐term survival rates for patients with synchronous BWT have improved. However, more than half of patients receive nephrectomy. The protocol should be changed to improve the rate of preservation of the renal parenchyma. Preoperative chemotherapy should be performed to shrink the tumors in every case, and subsequent NSS should be carried out after a central imaging evaluation. Pediatr Blood Cancer 2014;61:1184–1189. © 2014 Wiley Periodicals, Inc.
Author Hinotsu, Shiro
Koshinaga, Tsugumichi
Okita, Hajime
Kaneko, Yasuhiko
Fukuzawa, Masahiro
Oue, Takaharu
Author_xml – sequence: 1
  givenname: Takaharu
  surname: Oue
  fullname: Oue, Takaharu
  email: Correspondence to: Takaharu Oue, Department of Pediatric Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan., ooue@pedsurg.med.osaka-u.ac.jp
  organization: Department of Pediatric Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
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  givenname: Tsugumichi
  surname: Koshinaga
  fullname: Koshinaga, Tsugumichi
  organization: Department of Pediatric Surgery, Nihon University School of Medicine, Tokyo, Japan
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  givenname: Hajime
  surname: Okita
  fullname: Okita, Hajime
  organization: National Center for Child Health and Development, Tokyo, Japan
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  givenname: Yasuhiko
  surname: Kaneko
  fullname: Kaneko, Yasuhiko
  organization: Research Institute for Clinical Oncology, Saitama Cancer Center, Saitama, Japan
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  givenname: Shiro
  surname: Hinotsu
  fullname: Hinotsu, Shiro
  organization: Center for Innovative Clinical Medicine, Okayama University Hospital, Okayama, Japan
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  givenname: Masahiro
  surname: Fukuzawa
  fullname: Fukuzawa, Masahiro
  organization: Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan
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Keywords JWiTS
nephron-sparing surgery
chemotherapy
Wilms tumor
bilateral
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Snippet Background The introduction of multimodal therapy has improved the survival rate of bilateral Wilms tumors (BWT); however, the results are still not...
The introduction of multimodal therapy has improved the survival rate of bilateral Wilms tumors (BWT); however, the results are still not satisfactory in terms...
Background The introduction of multimodal therapy has improved the survival rate of bilateral Wilms tumors (BWT); however, the results are still not...
BACKGROUNDThe introduction of multimodal therapy has improved the survival rate of bilateral Wilms tumors (BWT); however, the results are still not...
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SubjectTerms Antineoplastic Combined Chemotherapy Protocols - administration & dosage
Asian Continental Ancestry Group
bilateral
chemotherapy
Child
Child, Preschool
Databases, Factual
Disease-Free Survival
Female
Hematology
Humans
Infant
Japan - epidemiology
JWiTS
Kidney Neoplasms - mortality
Kidney Neoplasms - pathology
Kidney Neoplasms - therapy
Male
nephron-sparing surgery
Oncology
Pediatrics
Retrospective Studies
Survival Rate
Wilms tumor
Wilms Tumor - mortality
Wilms Tumor - pathology
Wilms Tumor - therapy
Title Bilateral Wilms tumors treated according to the Japan Wilms Tumor Study Group protocol
URI https://api.istex.fr/ark:/67375/WNG-XV2V22NR-S/fulltext.pdf
https://onlinelibrary.wiley.com/doi/abs/10.1002%2Fpbc.24979
https://www.ncbi.nlm.nih.gov/pubmed/24623612
https://www.proquest.com/docview/1520309333
https://search.proquest.com/docview/1521325264
https://search.proquest.com/docview/1891867582
Volume 61
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