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Fattahi MR, Dehghani M, Paknahad S, Rahiminia S, Zareie D, Hoseini B, Oroomi TR, Motedayyen H, Arefnezhad R. Clinical insights into nanomedicine and biosafety: advanced therapeutic approaches for common urological cancers. Front Oncol 2024; 14:1438297. [PMID: 39193389 PMCID: PMC11347329 DOI: 10.3389/fonc.2024.1438297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2024] [Accepted: 07/29/2024] [Indexed: 08/29/2024] Open
Abstract
Urological cancers including those of the prostate, bladder, and kidney, are prevalent and often lethal malignancies besides other less common ones like testicular and penile cancers. Current treatments have major limitations like side effects, recurrence, resistance, high costs, and poor quality of life. Nanotechnology offers promising solutions through enhanced diagnostic accuracy, targeted drug delivery, controlled release, and multimodal imaging. This review reflects clinical challenges and nanomedical advances across major urological cancers. In prostate cancer, nanoparticles improve delineation and radiosensitization in radiation therapy, enable fluorescent guidance in surgery, and enhance chemotherapy penetration in metastatic disease. Nanoparticles also overcome bladder permeability barriers to increase the residence time of intravesical therapy and chemotherapy agents. In renal cancer, nanocarriers potentiate tyrosine kinase inhibitors and immunotherapy while gene vectors and zinc oxide nanoparticles demonstrate antiproliferative effects. Across modalities, urological applications of nanomedicine include polymeric, liposomal, and metal nanoparticles for targeted therapy, prodrug delivery, photodynamic therapy, and thermal ablation. Biosafety assessments reveal favorable profiles but clinical translation remains limited, necessitating further trials. In conclusion, nanotechnology holds significant potential for earlier detection, precise intervention, and tailored treatment of urological malignancies, warranting expanded research to transform patient outcomes.
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Affiliation(s)
- Mohammad Reza Fattahi
- School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | | | - Shafa Rahiminia
- School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Deniz Zareie
- School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Behzad Hoseini
- School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | | | - Hossein Motedayyen
- Autoimmune Diseases Research Center, Kashan University of Medical Sciences, Kashan, Iran
| | - Reza Arefnezhad
- Coenzyme R Research Institute, Tehran, Iran
- Shiraz University of Medical Sciences, Shiraz, Iran
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Bertolo R, Francolini G, Bukavina L. Functional Outcomes of Stereotactic Ablative Radiotherapy: There Is Room for Improvement. Eur Urol Oncol 2024:S2588-9311(24)00177-9. [PMID: 39084966 DOI: 10.1016/j.euo.2024.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2024] [Accepted: 07/16/2024] [Indexed: 08/02/2024]
Affiliation(s)
- Riccardo Bertolo
- Department of Urology, University of Verona, Borgo Trento Hospital, AOUI Verona, Verona, Italy.
| | - Giulio Francolini
- Radiation Oncology Unit, Oncology Department, Azienda Ospedaliero Universitaria Careggi, Firenze, Italy
| | - Laura Bukavina
- Glickman Urological Institute, Cleveland Clinic, Cleveland, OH, USA
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Huang RS, Chow R, Chopade P, Mihalache A, Hasan A, Boldt G, Glicksman R, Simone CB, Lock M, Raman S. Dose-response of localized renal cell carcinoma after stereotactic body radiation therapy: A meta-analysis. Radiother Oncol 2024; 194:110216. [PMID: 38462092 DOI: 10.1016/j.radonc.2024.110216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/02/2024] [Accepted: 03/04/2024] [Indexed: 03/12/2024]
Abstract
BACKGROUND Stereotactic ablative radiation therapy (SBRT) is an emerging treatment option for primary renal cell carcinoma (RCC), particularly in patients who are unsuitable for surgery. The aim of this review is to assess the effect of increasing the biologically equivalent dose (BED) via various radiation fractionation regimens on clinical outcomes. METHODS A literature search was conducted in PubMed (Medline), EMBASE, and the Cochrane Library for studies published up to October 2023. Studies reporting on patients with localized RCC receiving SBRT were included to determine its effectiveness on local control, progression-free survival, and overall survival. A random effects model was used to meta-regress clinical outcomes relative to the BED for each study and heterogeneity was assessed by I2. RESULTS A total of 724 patients with RCC from 22 studies were included, with a mean age of 72.7 years (range: 44.0-81.0). Local control was excellent with an estimate of 99 % (95 %CI: 97-100 %, I2 = 19 %), 98 % (95 %CI: 96-99 %, I2 = 8 %), and 94 % (95 %CI: 90-97 %, I2 = 11 %) at one year, two years, and five years respectively. No definitive association between increasing BED and local control, progression-free survival and overall survival was observed. No publication bias was observed. CONCLUSIONS A significant dose response relationship between oncological outcomes and was not identified, and excellent local control outcomes were observed at the full range of doses. Until new evidence points otherwise, we support current recommendations against routine dose escalation beyond 25-26 Gy in one fraction or 42-48 Gy in three fractions, and to consider de-escalation or compromising target coverage if required to achieve safe organ at risk doses.
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Affiliation(s)
- Ryan S Huang
- Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Ronald Chow
- Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Princess Margaret Cancer Centre, Temerty Faculty of Medicine, University of Toronto, Toronto, Canada; London Regional Cancer Program, London Health Sciences Centre, Schulich School of Medicine, University of Western Ontario, London, ON, Canada; New York Proton Center, New York, NY, USA
| | - Pradnya Chopade
- Princess Margaret Cancer Centre, Temerty Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Andrew Mihalache
- Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Asad Hasan
- University of British Columbia, Vancouver, British Columbia, Canada
| | - Gabriel Boldt
- London Regional Cancer Program, London Health Sciences Centre, Schulich School of Medicine, University of Western Ontario, London, ON, Canada
| | - Rachel Glicksman
- Princess Margaret Cancer Centre, Temerty Faculty of Medicine, University of Toronto, Toronto, Canada
| | | | - Michael Lock
- London Regional Cancer Program, London Health Sciences Centre, Schulich School of Medicine, University of Western Ontario, London, ON, Canada
| | - Srinivas Raman
- Princess Margaret Cancer Centre, Temerty Faculty of Medicine, University of Toronto, Toronto, Canada.
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4
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Greenwood H, Hassan J, Fife K, Ajithkumar TV, Thippu Jayaprakash K. Single-Fraction Stereotactic Ablative Body Radiotherapy for Primary and Extracranial Oligometastatic Cancers. Clin Oncol (R Coll Radiol) 2023; 35:773-786. [PMID: 37852814 DOI: 10.1016/j.clon.2023.10.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 09/14/2023] [Accepted: 10/04/2023] [Indexed: 10/20/2023]
Abstract
Stereotactic ablative body radiotherapy (SABR) consists of delivering high doses of ionising radiation, typically across three to eight fractions with high precision and conformity. SABR has become increasingly commonplace throughout the last quarter of a century and is offered for the treatment of various primary and metastatic tumour types. Delivering SABR in a single fraction has arisen as an appealing possibility for several reasons. These include fewer hospital visits, greater patient convenience, improved sustainability and lower costs. However, these factors must be balanced against considerations such as toxicity, side-effects and, most importantly, progression-free and overall survival. In this review we seek to analyse the results of studies looking at the efficacy of single-fraction SABR for lung, prostate, renal and pancreas primary tumours, as well as oligometastases. The tumour type to be most widely treated with single-fraction SABR is lung, but its remit continues to expand. We also look at the biological rationale underpinning SABR and how this can be extended to single-fraction regimens. Finally, we turn our attention towards the future directions of SABR and specifically single-fraction regimens. These include the possibility of combining SABR with immunotherapy and technological advances in the field, which could serve to expand the scope of SABR. We conclude by summarising the current clinical studies of single-fraction SABR.
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Affiliation(s)
- H Greenwood
- School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - J Hassan
- University College London Medical School, London, UK
| | - K Fife
- Oncology Centre, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - T V Ajithkumar
- Oncology Centre, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - K Thippu Jayaprakash
- Oncology Centre, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK; Department of Oncology, The Queen Elizabeth Hospital King's Lynn NHS Foundation Trust, King's Lynn, UK.
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5
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Green H, Taylor A, Khoo V. Beyond the Knife in Renal Cell Carcinoma: A Systematic Review-To Ablate or Not to Ablate? Cancers (Basel) 2023; 15:3455. [PMID: 37444565 DOI: 10.3390/cancers15133455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023] Open
Abstract
Intensified systemic therapy in metastatic renal cell carcinoma (mRCC) has led to improved patient outcomes. Patients commonly require local control of one or a few metastases. The aim was to evaluate metastasis-directed ablative therapies in extracranial mRCC. Two databases and one registry were searched, using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) approach, for all prospective and matched-pair case-control mRCC studies of radiofrequency ablation (RFA), cryotherapy, microwave ablation (MWA), and stereotactic body radiotherapy (SBRT). Eighteen studies were identified. Fourteen investigated SBRT in 424 patients. Four thermal ablation studies were identified: two cryotherapy (56 patients) and two RFA studies (90 patients). The median participant number was 30 (range 12-69). The combined median follow-up was 17.3 months (range 8-52). Four SBRT studies reported local control (LC) at 12 months, median 84.4% (range 82.5-93). Seven studies (six SBRT and one cryotherapy) reported an LC rate of median 87% (79-100%). Median overall survival (OS) was reported in eight studies (five SBRT, two cryotherapy, and one RFA) with a median of 22.7 months (range 6.7-not reached). Median progression-free survival was reported in seven studies (five SBRT, one cryotherapy, and one RFA); the median was 9.3 months (range 3.0-22.7 months). Grade ≥ 3 toxicity ranged from 1.7% to 10%. SBRT has excellent local control outcomes and acceptable toxicity. Only four eligible thermal ablative studies were identified and could not be compared with SBRT. Translationally rich definitive studies are warranted.
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Affiliation(s)
- Harshani Green
- Royal Marsden Hospitals NHS Foundation Trust, London SW3 6JJ, UK
- Institute of Cancer Research, London SW7 3RP, UK
| | - Alexandra Taylor
- Royal Marsden Hospitals NHS Foundation Trust, London SW3 6JJ, UK
- Institute of Cancer Research, London SW7 3RP, UK
| | - Vincent Khoo
- Royal Marsden Hospitals NHS Foundation Trust, London SW3 6JJ, UK
- Institute of Cancer Research, London SW7 3RP, UK
- Department of Medical Imaging and Radiation Science, Monash University, Clayton, VIC 3800, Australia
- Department of Medicine, University of Melbourne, Parkville, VIC 3010, Australia
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Tran KT, Chevli NC, Messer JA, Haque W, Farach AM, Satkunasivam R, Zhang J, Darcourt J, Lo SS, Siva S, Butler EB, Teh BS. Prognostic impact of biologically equivalent dose in stereotactic body radiotherapy for renal cancer. Clin Transl Radiat Oncol 2023; 39:100592. [PMID: 36935857 PMCID: PMC10014330 DOI: 10.1016/j.ctro.2023.100592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 02/03/2023] [Accepted: 02/05/2023] [Indexed: 02/11/2023] Open
Abstract
Purpose /Objectives Materials/Methods The National Cancer Database (NCDB) was queried (2004-2017) for patients with RCC who did not have surgical resection but received definitive SBRT. Kaplan-Meier analysis with log-rank test was used to evaluate overall survival (OS). Univariable (UVA) and multivariable (MVA) analysis were conducted using cox proportional hazard models to determine prognostic factors for OS. Results A total of 344 patients with median age 77 (IQR 70-85) were included in this study. Median BED3 was 180 Gy (IQR 126.03-233.97). Median OS was 90 months in the highest quartile compared to 36-52 months in the lower three quartiles (p < 0.01). On UVA, the highest BED3 quartile was a positive prognostic factor (HR 0.67, p < 0.01 CI 0.51-0.91) while age, tumor size, T-stage, metastasis, renal pelvis location, and transitional cell histology were negative factors. On MVA, the highest BED3 quartile was remained significant (HR 0.69, p = 0.02; CI 0.49-0.95) as a positive factor, while age, metastasis were negative factors. Conclusion Higher BED may be associated with improved OS. Prospective investigation is needed to clearly define optimal BED for SBRT used to treat RCC.
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Affiliation(s)
- Kevin T. Tran
- Department of Radiation Oncology, The University of Texas Medical Branch, Galveston, TX, United States
| | - Neil C. Chevli
- Department of Radiation Oncology, The University of Texas Medical Branch, Galveston, TX, United States
| | - Jay A. Messer
- Department of Radiation Oncology, The University of Texas Medical Branch, Galveston, TX, United States
| | - Waqar Haque
- Department of Radiation Oncology, Houston Methodist Hospital, Houston, TX, United States
| | - Andrew M. Farach
- Department of Radiation Oncology, Houston Methodist Hospital, Houston, TX, United States
| | - Raj Satkunasivam
- Department of Urologic Oncology, Houston Methodist Hospital, Houston, TX, United States
| | - Jun Zhang
- Department of Medical Oncology, Houston Methodist Hospital, Houston, TX, United States
| | - Jorge Darcourt
- Department of Medical Oncology, Houston Methodist Hospital, Houston, TX, United States
| | - Simon S. Lo
- Department of Radiation Oncology, University of Washington, Seattle, WA, United States
| | - Shankar Siva
- Peter MacCallum Cancer Centre and The University of Melbourne, Melbourne, Victoria, Australia
| | - Edward B. Butler
- Department of Radiation Oncology, Houston Methodist Hospital, Houston, TX, United States
| | - Bin S. Teh
- Department of Radiation Oncology, Houston Methodist Hospital, Houston, TX, United States
- Corresponding author at: 6565 Fannin St. DB1-077, Houston, TX 77030, United States.
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7
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Sosa-Fajardo P, Blanco-Suarez JM, Pineda-Munguía Á, Rubí-Olea L, Peleteiro-Higuero P, Gajate P, Zafra-Martín J, Siva S, Bossi A, López-Campos F, Couñago F. Stereotactic body radiation therapy for kidney cancer. Where do we stand? Int J Urol 2023; 30:437-445. [PMID: 36746747 DOI: 10.1111/iju.15156] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 01/12/2023] [Indexed: 02/08/2023]
Abstract
At present, surgery is still the gold standard for the local treatment of renal cancer. Nonetheless, in several clinical scenarios, stereotactic body radiation therapy (SBRT) also known as stereotactic ablative body radiotherapy (SABR) is emerging as a highly effective ablative technique in fragile patients and those with significant comorbidities, as well as in cases where percutaneous therapy (cryoablation or radiofrequency) is not viable. However, considering the intrinsic radioresistance of renal tumors, the optimal treatment schemes have not been established. In oligometastatic patients, it has been reported that the control of the oligometastases can be a potentially curable approach. Being a technique than can be administered exclusively or in combination with systemic therapy, treatment individualization based on patient characteristics is key. Another scenario under investigation is oligoprogression, where SBRT offers the possibility of delaying further lines of systemic therapy by eliminating subclones of resistant tumor with ablative doses, with the additional opportunity of stimulating the immune system (immunomodulatory role). In this review, we have conducted an analysis of recently published studies that test the role of this technique in different clinical scenarios of this disease. We have found promising results that make SBRT a potent therapeutic approach with low toxicity. We also comment on ongoing studies that will generate the necessary evidence needed for the implementation of this technique in our daily clinical practice.
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Affiliation(s)
- Paloma Sosa-Fajardo
- Department of Radiation Oncology, Instituto de Biomedicina de Sevilla (IBIS/CSIC/CIBERONC), University Hospital Virgen del Rocio, Universidad de Sevilla, Sevilla, Spain
| | - Jesús M Blanco-Suarez
- Department of Radiation Oncology, Instituto de Biomedicina de Sevilla (IBIS/CSIC/CIBERONC), University Hospital Virgen del Rocio, Universidad de Sevilla, Sevilla, Spain
| | | | - Luz Rubí-Olea
- Radiation Oncology Department, University Regional Hospital, Málaga, Spain
| | - Paula Peleteiro-Higuero
- Radiation Oncology Department, University Hospital Complex of Santiago de Compostela, Santiago de Compostela, Spain
| | - Pablo Gajate
- Medical Oncology Department, Ramon y Cajal Hospital, IRYCIS, Madrid, Spain
| | - Juan Zafra-Martín
- Group of Translational Research in Cancer Immunotherapy, Health and Medical Research Centre (CIMES), Institute of Biomedical Research in Malaga (IBIMA), University of Malaga (UMA), Malaga, Spain.,Department of Radiation Oncology, Virgen de la Victoria University Hospital, Malaga, Spain.,Faculty of Medicine, University of Malaga (UMA), Malaga, Spain
| | - Shankar Siva
- Sir Peter MacCallum Department of Oncology, Peter MacCallum Cancer Centre, University of Melbourne, Melbourne, Victoria, Australia
| | - Alberto Bossi
- Department of Radiation Oncology, University Hospitals Gasthuisberg, Leuven, Belgium
| | | | - Felipe Couñago
- Radiation Oncology Department, GenesisCare Madrid Clinical Director, San Francisco de Asis and La Milagrosa Hospitals, National Chair of Research and Clinical Trials, GenesisCare, Madrid, Spain
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8
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Ma MW, Li HZ, Gao XS, Liu MZ, Yin H, Yang KW, Chen JY, Ren XY, Wang D. Outcomes of High-Dose Stereotactic Ablative Radiotherapy to All/Multiple Sites for Oligometastatic Renal Cell Cancer Patients. Curr Oncol 2022; 29:7832-7841. [PMID: 36290896 PMCID: PMC9600736 DOI: 10.3390/curroncol29100619] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/13/2022] [Accepted: 10/15/2022] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Stereotactic ablative body radiotherapy (SABR) is one of the treatment options for oligometastatic renal cell carcinoma (RCC) but is limited by a lack of data to evaluate high-dose SABR to all/multiple sites. OBJECTIVE This study retrospectively investigated the efficacy and prognostic factors of high-dose SABR for oligometastatic RCC patients. DESIGN, SETTING, AND PARTICIPANTS Patients with oligometastatic RCC on systemic therapy were retrospectively collected. INTERVENTION(S) All patients were treated with SABR (40-50 Gy/5 fractions) for small tumors or partial-SABR (tumor center boosted with 6-8 Gy/3-5 fractions with 50-60 Gy/20-25 fractions to the whole tumor volume) for bulky tumors or tumors adjacent to critical organs. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS Progression-free survival (PFS) and overall survival (OS) were calculated. RESULTS AND LIMITATIONS In total, 35 patients were enrolled, of which 88.5% had intermediate- or high-risk disease, with 60% on second- to fourth-line systemic therapy. The median follow-up time was 17 months. The median PFS and OS times were 11.3 and 29.7 months, respectively. Univariate analysis showed that an OS benefit was found in patients who received radiation before tyrosine kinase inhibitor (TKI) failure (p = 0.006) and where there was a short time interval (<six months) from being diagnosed with metastatic disease to undergoing radiotherapy (p = 0.046). Similar results were also found in PFS in patients who received radiation before TKI failure (p = 0.049) or within eight months (p = 0.047). There were certain differences in PFS (p = 0.033) between patients receiving radiotherapy with all lesions and those with selected tumors. In multivariate analysis, OS benefits were found in patients who received radiotherapy before TKI failure (p = 0.028). The limitations of this study include its retrospective design and the small patient cohort. CONCLUSIONS The early use of high-dose SABR to multi-lesions may improve survival. Partial-SABR for bulky lesions close to critical organs could be safely and effectively applied under certain circumstances.
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Affiliation(s)
- Ming-Wei Ma
- Department of Radiation Oncology, Peking University First Hospital, Beijing 100034, China
| | - Hong-Zhen Li
- Department of Radiation Oncology, Peking University First Hospital, Beijing 100034, China
| | - Xian-Shu Gao
- Department of Radiation Oncology, Peking University First Hospital, Beijing 100034, China
- Correspondence: (X.-S.G.); (D.W.); Tel.: +86-010-83575641 (X.-S.G.); +1-312-942-5751 (D.W.); Fax: +86-010-66551788 (X.-S.G.); +1-312-942-2829 (D.W.)
| | - Ming-Zhu Liu
- Department of Radiation Oncology, Peking University First Hospital, Beijing 100034, China
| | - Huan Yin
- Department of Health Science & Technology Strategy Information, Institute of Medical Information, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100006, China
| | - Kai-Wei Yang
- Department of Urology, Peking University First Hospital, Beijing 100034, China
| | - Jia-Yan Chen
- Department of Radiation Oncology, Peking University First Hospital, Beijing 100034, China
| | - Xue-Ying Ren
- Department of Radiation Oncology, Peking University First Hospital, Beijing 100034, China
| | - Dian Wang
- Department of Radiation Oncology, Rush University Medical Center, Chicago, IL 60612, USA
- Correspondence: (X.-S.G.); (D.W.); Tel.: +86-010-83575641 (X.-S.G.); +1-312-942-5751 (D.W.); Fax: +86-010-66551788 (X.-S.G.); +1-312-942-2829 (D.W.)
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9
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Ishikawa H, Hiroshima Y, Kanematsu N, Inaniwa T, Shirai T, Imai R, Suzuki H, Akakura K, Wakatsuki M, Ichikawa T, Tsuji H. Carbon-ion radiotherapy for urological cancers. Int J Urol 2022; 29:1109-1119. [PMID: 35692124 PMCID: PMC9796467 DOI: 10.1111/iju.14950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 05/16/2022] [Indexed: 01/01/2023]
Abstract
Carbon-ions are charged particles with a high linear energy transfer, and therefore, they make a better dose distribution with greater biological effects on the tumors compared with photons and protons. Since prostate cancer, renal cell carcinoma, and retroperitoneal sarcomas such as liposarcoma and leiomyosarcoma are known to be radioresistant tumors, carbon-ion radiotherapy, which provides the advantageous radiobiological properties such as an increasing relative biological effectiveness toward the Bragg peak, a reduced oxygen enhancement ratio, and a reduced dependence on fractionation and cell-cycle stage, has been tested for these urological tumors at the National Institute for Radiological Sciences since 1994. To promote carbon-ion radiotherapy as a standard cancer therapy, the Japan Carbon-ion Radiation Oncology Study Group was established in 2015 to create a registry of all treated patients and conduct multi-institutional prospective studies in cooperation with all the Japanese institutes. Based on accumulating evidence of the efficacy and feasibility of carbon-ion therapy for prostate cancer and retroperitoneal sarcoma, it is now covered by the Japanese health insurance system. On the other hand, carbon-ion radiotherapy for renal cell cancer is not still covered by the insurance system, although the two previous studies showed the efficacy. In this review, we introduce the characteristics, clinical outcomes, and perspectives of carbon-ion radiotherapy and our efforts to disseminate the use of this new technology worldwide.
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Affiliation(s)
- Hitoshi Ishikawa
- QST HospitalNational Institutes for Quantum Science and TechnologyChibaJapan
| | - Yuichi Hiroshima
- QST HospitalNational Institutes for Quantum Science and TechnologyChibaJapan
| | - Nobuyuki Kanematsu
- QST HospitalNational Institutes for Quantum Science and TechnologyChibaJapan
| | - Taku Inaniwa
- QST HospitalNational Institutes for Quantum Science and TechnologyChibaJapan
| | - Toshiyuki Shirai
- QST HospitalNational Institutes for Quantum Science and TechnologyChibaJapan
| | - Reiko Imai
- QST HospitalNational Institutes for Quantum Science and TechnologyChibaJapan
| | - Hiroyoshi Suzuki
- Department of UrologyToho University Sakura Medical CenterChibaJapan
| | - Koichiro Akakura
- Department of UrologyJapan Community Health‐care Organization Tokyo Shinjuku Medical CenterTokyoJapan
| | - Masaru Wakatsuki
- QST HospitalNational Institutes for Quantum Science and TechnologyChibaJapan
| | - Tomohiko Ichikawa
- Department of UrologyChiba University Graduate School of MedicineChibaJapan
| | - Hiroshi Tsuji
- QST HospitalNational Institutes for Quantum Science and TechnologyChibaJapan
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10
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Zhang C, Wang S, Mansi A, Katzir M. In situ real time dosimetric studies for spine stereotactic body radiation therapy in a cadaver implanted with carbon fiber and titanium instrumentation. World Neurosurg 2022; 164:e749-e754. [PMID: 35595045 DOI: 10.1016/j.wneu.2022.05.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To compare the dosimetric accuracy of post-operative SBRT in a carbon-fiber versus titanium instrumented spine using cadaveric model METHODS: In situ cadaveric implantation of titanium and carbon fiber instrumentation and dosimeter chips in a thoracic spine. The cadaver underwent SBRT and dose of RT was calculated, measured, and then compared. The sensors were placed in positions to provide data on dosimetry near the screws (within 1 cm) as well as between the screws. The differences between calculated and measured doses were reported as in percentage. RESULTS There was a significant difference in the dosimetry from calculated versus measured values near the screws of carbon fiber compared to titanium (P = 0.0057) with a mean percentage difference of only 2.93 for CF and a much higher value of 19.32 for titanium near the screws. There was also greater variability in the percent difference for the two screw types, with differences ranging from -16.54% to 35.20% near titanium screws and -3.37% to 1.66% near CF screws. CONCLUSION More accurate dosimetry and RT delivery with carbon fiber screws compared to traditional titanium screws may have implications on optimal radiation delivery as well as complication avoidance. This may be due to reduced scatter and thus lower variability in radiation delivery with VMAT technique.
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Affiliation(s)
- Chi Zhang
- Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE
| | - Shuo Wang
- Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE
| | - Ahmed Mansi
- Department of Neurosurgery, University of Nebraska Medical Center, Omaha, NE
| | - Miki Katzir
- Department of Neurosurgery, University of Nebraska Medical Center, Omaha, NE.
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11
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Verification of rebuild-up effect on superficial cardiac lesion of ventricular tachycardia using 3-D printed phantom in volumetric-modulated arc therapy planning. Sci Rep 2022; 12:2270. [PMID: 35145129 PMCID: PMC8831566 DOI: 10.1038/s41598-022-05149-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Accepted: 01/04/2022] [Indexed: 11/30/2022] Open
Abstract
The aim of the study was to evaluate dose distributions on the superficial cardiac lesion surrounded by low-density lungs. Volumetric modulated arc therapy (VMAT) technique was applied to optimize the dose distribution using the anisotropic analytic algorithm (AAA) and Acuros XB algorithm (AXB) using the 3-D printed cardiac phantom. We used four full and half arcs with 6-MV and 15-MV photons to investigate the rebuild-up effect near the planning target volume (PTV). Depending on the calculation algorithm (AAA vs. AXB) for full arcs plans, V95 of PTV differed by 27% for 6-MV and 29% for 15-MV, and D95 for 6-MV and 15-MV shows 24% and 30%, respectively. The maximum doses in the AXB plans on PTV were 5.1% higher than those in AAA plans at 6-MV, and 3.8% higher at 15-MV. In addition, half arcs treatment plans showed a very similar tendency with full arcs plans. Film dosimetry showed significant differences from the planned results in the AAA plans. Particularly, the dose mismatch occurred between the cardiac PTV and the left lung interface. In the case of 6-MV plans calculated by AAA, the maximum dose increased from 4.1 to 7.7% in the PTV. Furthermore, it showed that 50% of the width of dose profiles was reduced by 1.3 cm in the 6-MV plan. Conversely, in the case of the plans using the AXB algorithm, the maximum dose increased by 2.0–5.0%. In contrast to the AAA algorithm, the dose patterns at the interface demonstrated a good agreement with the plans. Dose fluctuation on the interface between superficial cardiac lesions and low-density lungs can lead to an error in the estimation of accurate dose delivery for the case of VT SBRT.
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Wulff-Burchfield E. Supportive and Palliative Care for Genitourinary Malignancies. Urol Oncol 2022. [DOI: 10.1007/978-3-030-89891-5_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Candelario N, Geiger C, Flaig T. Sarcomatoid Renal Cell Carcinoma: The Present and Future of Treatment Paradigms. KIDNEY CANCER 2021. [DOI: 10.3233/kca-210126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Sarcomatoid renal cell carcinoma (sRCC) is an aggressive form of kidney cancer that is associated with poor prognosis. It can arise from any histologic type of renal cell carcinoma. The majority of cases will present with advanced or metastatic disease requiring systemic therapy. Nephrectomy is the treatment of choice in locally resectable disease. The therapeutic options for sRCC have evolved in the past decade. Cytotoxic chemotherapy and monotherapy with targeted therapy (VEGF and mTOR) have historically shown poor response rates and survival in the treatment of metastatic sRCC. The use of checkpoint inhibitors and their combination with targeted therapy against VEGF has changed the landscape and outcomes for renal cell carcinoma. Given the rarity of sRCC most of the data on treatment is from small cohorts or extrapolation from larger clinical trials. The benefit from the combination of checkpoint inhibitors and targeted therapy to VEGF has shown promise in the sRCC population in post hoc analysis of large clinical trials. Future research focusing on further characterizing the unique biologic and clinical features of sRCC is critical in advancing the knowledge and developing effective therapy to improve clinical outcomes and survival.
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Affiliation(s)
- Nellowe Candelario
- University of Colorado Cancer Center, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, USA
- Division of Medical Oncology, School of Medicine, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, USA
| | - Christopher Geiger
- University of Colorado Cancer Center, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, USA
- Division of Medical Oncology, School of Medicine, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, USA
| | - Thomas Flaig
- University of Colorado Cancer Center, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, USA
- Division of Medical Oncology, School of Medicine, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, USA
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Prunty M, Bukavina L, Psutka SP. Metastasectomy in kidney cancer: current indications and treatment approaches. Curr Opin Support Palliat Care 2021; 15:266-275. [PMID: 34610626 DOI: 10.1097/spc.0000000000000574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW Although systemic agents for the treatment of metastatic renal cell carcinoma (mRCC) have improved survival, remission and cure for mRCC remains rare with systemic therapy alone. However, there is a body of observational evidence supporting a survival benefit in mRCC among patients who undergo complete surgical consolidation including resection of the primary tumor and all metastatic deposits. In this review, we aim to synthesize recent evidence regarding metastasectomy (MTS), with or without concurrent systemic therapy, in mRCC. RECENT FINDINGS MTS is a critical component of mRCC patient care, alongside modern systemic therapy. Presently, there is a robust body of observational data supporting the association between surgical MTS and improved oncologic outcomes, especially when complete MTS is feasible. SUMMARY Among a retrospective, observational body of literature, MTS is associated with improved oncologic outcomes. However, it is impossible to discern to what degree these findings are biased by favorable tumor biology and patient selection, as opposed to being related to surgical MTS itself.
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Affiliation(s)
- Megan Prunty
- Department of Urology, Case Western Reserve University, University Hospitals Cleveland Medical Center, Cleveland, Ohio
| | - Laura Bukavina
- Division of Urologic Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Sarah P Psutka
- Department of Urology, University of Washington, Seattle, Washington, USA
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15
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Haroon M, Sathiadoss P, Hibbert RM, Jeyaraj SK, Lim C, Schieda N. Imaging considerations for thermal and radiotherapy ablation of primary and metastatic renal cell carcinoma. Abdom Radiol (NY) 2021; 46:5386-5407. [PMID: 34245341 DOI: 10.1007/s00261-021-03178-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/09/2021] [Accepted: 06/10/2021] [Indexed: 10/20/2022]
Abstract
Ablative (percutaneous and stereotactic) thermal and radiotherapy procedures for management of both primary and metastatic renal cell carcinoma are increasing in popularity in clinical practice. Data suggest comparable efficacy with lower cost and morbidity compared to nephrectomy. Ablative therapies may be used alone or in conjunction with surgery or chemotherapy for treatment of primary tumor and metastatic disease. Imaging plays a crucial role in pre-treatment selection and planning of ablation, intra-procedural guidance, evaluation for complications, short- and long-term post-procedural surveillance of disease, and treatment response. Treatment response and disease recurrence may differ considerably after ablation, particularly for stereotactic radiotherapy, when compared to conventional surgical and chemotherapies. This article reviews the current and emerging role of imaging for ablative therapy of renal cell carcinoma.
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Francolini G, Trodella LE, Marvaso G, Matrone F, Nicosia L, Timon G, Ognibene L, Vinciguerra A, Franzese C, Borghetti P, Arcangeli S. Radiotherapy role in non-seminomatous germ cell tumors, radiobiological and technical issues of an unexplored scenario. Int J Clin Oncol 2021; 26:1777-1783. [PMID: 34273014 DOI: 10.1007/s10147-021-01989-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 07/07/2021] [Indexed: 12/01/2022]
Abstract
Historically, non-seminomatous germ cell tumor (NSGCT) has been considered a radio-resistant disease, excluding radiotherapy (RT) from curative strategies. However, case series exploring the use of radiation treatment in this setting are often outdated, and prospective ongoing studies testing new radiotherapeutic approaches in NSGCT are lacking. Considering that tremendous advances in radiotherapy technology have enabled improved precision in RT delivery as well as dose escalation while decreasing treatment-related morbidity, we overviewed the currently available literature to explore the radiobiological basis, the technical issues, and potential strategies for implementation of RT in the management of this clinical entity. The purpose of the present overview is to provide insight for future research in this unexplored scenario. In summary, the biological rationale for RT use and potential implementation with systemic therapies exist, especially considering the advantage of new technologies, which were unavailable in the era of early literature reports. The NSGCT radioresistance paradigm could be based only on the fact that effective treatment schedules were simply undeliverable with older RT techniques due to toxicity issues, but the availability of actual techniques may prompt further exploration to offer treatment alternatives to these patients. Ongoing trials on this issue are lacking, but potential areas of research are platinum-refractory disease and consolidation therapy for residual masses after PST.
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Affiliation(s)
- Giulio Francolini
- Radiation Oncology Unit, Azienda Ospedaliero-Universitaria Careggi, Viale Morgagni 85, 50134, Florence, Italy.
| | - Luca Eolo Trodella
- Radiation Oncology, Campus Bio-Medico University, Via A. del Portillo, 21, 00128, Rome, Italy
| | - Giulia Marvaso
- Division of Radiation Oncology, IEO, European Institute of Oncology IRCCS; Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - Fabio Matrone
- Department of Radiation Oncology, Centro di Riferimento Oncologico di Aviano CRO-IRCCS, Aviano, Pordenone, Italy
| | - Luca Nicosia
- Advanced Radiation Oncology Department, Cancer Care Center, IRCCS Sacro Cuore Don Calabria Hospital, via Don Sempreboni 5, 37034, Verona, Negrar, Italy
| | - Giorgia Timon
- Radioterapia Oncologica, Azienda Unità Sanitaria Locale-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Lucia Ognibene
- Radiotherapy Unit, San Gaetano Radiotherapy and Nuclear Medicine Center, Palermo, Italy
| | - Annamaria Vinciguerra
- Department of Radiation Oncology, "SS Annunziata" Hospital, "G. D'Annunzio" University, Via dei Vestini, 66100, Chieti, Italy
| | - Ciro Franzese
- Department of Biomedical Sciences, Humanitas University, Radiotherapy and Radiosurgery Department -Humanitas Research Hospital IRCCS, Rozzano, Milan, Italy
| | - Paolo Borghetti
- Radiation Oncology Department, University and Spedali Civili of Brescia, Brescia, Italy
| | - Stefano Arcangeli
- Department of Radiation Oncology, School of Medicine and Surgery-University of Milan Bicocca, Milan, Italy
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Abstract
Renal cell carcinoma (RCC) is increasing in incidence and one third of newly diagnosed cases already are metastatic. The metastatic spread of solid tumors renders RCC incurable by surgical resection and consequently more difficult to treat. New molecular-targeted therapies have played a pivotal role in RCC treatment. Unfortunately, tumors frequently develop resistance to these targeted therapies by activating bypass pathways in which alternative signaling or biochemical pathways are activated in response to targeted inhibition of a signaling pathway, allowing cancer cells to continue to survive. Although the advent of immunotherapy with checkpoint inhibitors has led to significant changes in the treatment landscape for advanced RCC, many issues remain to be resolved. For these reasons, there is an urgent need to develop novel therapies and new treatment paradigms for patients with RCC. Much research has been performed thus far in identifying novel targets and treatment strategies in RCC and many of these currently are under investigation and/or in clinical trials. In this article, we discuss therapeutic options in the management of RCC with a focus on the new therapeutic approaches currently investigated in research and for use in the clinic. We divide these potential novel therapies into five groups: nonbiologics, small-molecule drugs, biologics, immunomodulatory therapies, and peptide drugs. We also present some therapeutics and treatment paradigms.
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Affiliation(s)
- David C Yang
- Division of Nephrology, Department of Internal Medicine, University of California Davis, Davis, CA
| | - Ching-Hsien Chen
- Division of Nephrology, Department of Internal Medicine, University of California Davis, Davis, CA.
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The Role of Daily Adaptive Stereotactic MR-Guided Radiotherapy for Renal Cell Cancer. Cancers (Basel) 2020; 12:cancers12102763. [PMID: 32992844 PMCID: PMC7601380 DOI: 10.3390/cancers12102763] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/16/2020] [Accepted: 09/22/2020] [Indexed: 01/20/2023] Open
Abstract
Simple Summary Standard treatment for localized renal cell carcinoma (RCC) is surgery. Stereotactic radiotherapy given in a few high dose fractions is a promising treatment for this indication and could be an alternative option for patients unsuitable for surgery. Stereotactic MR-guided radiotherapy (MRgRT) is clinically implemented as a new technique for precise treatment delivery of abdominal tumors, like RCC. In this study, we evaluated the clinical impact of stereotactic MRgRT given in five fractions of 8 Gy and routine plan re-optimization for 36 patients with large primary RCCs. Our evaluation showed good oncological results with minimal side-effects. Even in this group with large tumors, daily plan re-optimization was only needed in a minority of patients who can be identified upfront. This is a favorable result since online MRgRT plan adaptation is a time-consuming procedure. In these patients, MRgRT delivery will be faster, and these patients could be candidates for even less fractions per treatment. Abstract Novel magnetic-resonance-guided radiotherapy (MRgRT) permits real-time soft-tissue visualization, respiratory-gated delivery with minimal safety margins, and time-consuming daily plan re-optimisation. We report on early clinical outcomes of MRgRT and routine plan re-optimization for large primary renal cell cancer (RCC). Thirty-six patients were treated with MRgRT in 40 Gy/5 fractions. Prior to each fraction, re-contouring of tumor and normal organs on a pretreatment MR-scan allowed daily plan re-optimization. Treatment-induced toxicity and radiological responses were scored, which was followed by an offline analysis to evaluate the need for such daily re-optimization in 180 fractions. Mean age and tumor diameter were 78.1 years and 5.6 cm, respectively. All patients completed MRgRT with an average fraction duration of 45 min. Local control (LC) and overall survival rates at one year were 95.2% and 91.2%. No grade ≥3 toxicity was reported. Plans without re-optimization met institutional radiotherapy constraints in 83.9% of 180 fractions. Thus, daily plan re-optimization was required for only a minority of patients, who can be identified upfront by a higher volume of normal organs receiving 25 Gy in baseline plans. In conclusion, stereotactic MRgRT for large primary RCC showed low toxicity and high LC, while daily plan re-optimization was required only in a minority of patients.
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Berghen C, Joniau S, Vulsteke C, Albersen M, Devos G, Rans K, Haustermans K, De Meerleer G. Metastasis-directed therapy for oligometastatic urological tumours: still no second-hand news. Ecancermedicalscience 2020; 14:1036. [PMID: 32565889 PMCID: PMC7289610 DOI: 10.3332/ecancer.2020.1036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Indexed: 12/31/2022] Open
Abstract
For patients presenting with limited metastatic disease burden, known as the oligometastatic state of disease, a more aggressive treatment approach targeting the new or progressive metastatic lesions might improve patient outcome, with no or only limited toxicity to be expected from the treatment. This review provides an overview of the existing evidence and on-going trials on oligometastatic disease and metastasis-directed therapy in the field of renal, bladder and prostate cancer.
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Affiliation(s)
- Charlien Berghen
- Department of Radiation Oncology, Leuven University Hospital, Leuven, Belgium
| | - Steven Joniau
- Department of Urology, Leuven University Hospital, Leuven, Belgium
| | - Christof Vulsteke
- Department of Oncology, Ghent Maria Middelares Hospital, Ghent, Belgium
- Department of Molecular Imaging, Pathology, Radiotherapy and Oncology (MIPRO), Center for Oncological Research (CORE), University of Antwerp, Antwerp, Belgium
| | - Maarten Albersen
- Department of Urology, Leuven University Hospital, Leuven, Belgium
| | - Gaëtan Devos
- Department of Urology, Leuven University Hospital, Leuven, Belgium
| | - Kato Rans
- Department of Radiation Oncology, Leuven University Hospital, Leuven, Belgium
| | - Karin Haustermans
- Department of Radiation Oncology, Leuven University Hospital, Leuven, Belgium
| | - Gert De Meerleer
- Department of Radiation Oncology, Leuven University Hospital, Leuven, Belgium
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Uhlig A, Uhlig J, Trojan L, Kim HS. Stereotactic Body Radiotherapy for Stage I Renal Cell Carcinoma: National Treatment Trends and Outcomes Compared to Partial Nephrectomy and Thermal Ablation. J Vasc Interv Radiol 2020; 31:564-571. [PMID: 32127324 DOI: 10.1016/j.jvir.2019.11.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 10/27/2019] [Accepted: 11/05/2019] [Indexed: 12/24/2022] Open
Abstract
PURPOSE To assess use of stereotactic body radiotherapy (SBRT) for stage I renal cell carcinoma (RCC) and compare outcomes with thermal ablation and partial nephrectomy (PN). MATERIALS AND METHODS The 2004-2015 National Cancer Database was investigated for histopathologically proven stage I RCC treated with PN, cryoablation, radiofrequency (RF) or microwave (MW) ablation, or SBRT. Patients were propensity score-matched to account for potential confounders, including patient age, sex, race, comorbidities, tumor size, histology, grade, tumor sequence, administration of systemic therapy, treatment in academic vs nonacademic centers, treatment location, and year of diagnosis. Overall survival (OS) was evaluated with Kaplan-Meier plots, log-rank tests, and Cox proportional hazards models. RESULTS A total of 91,965 patients were identified (SBRT, n = 174; PN, n = 82,913; cryoablation, n = 5,446; RF/MW ablation, n = 3,432). Stage I patients who received SBRT tended to be older women with few comorbidities treated at nonacademic centers in New England states. After propensity score matching, a cohort of 636 patients was obtained with well-balanced confounders between treatment groups. In the matched cohort, OS after SBRT was inferior to OS after PN and thermal ablation (PN vs SBRT, hazard ratio [HR] = 0.29, 95% confidence interval [CI] 0.19-0.46, P < .001; cryoablation vs SBRT, HR = 0.40, 95% CI 0.26-0.60, P < .001; RF/MW ablation vs SBRT, HR = 0.46, 95% CI 0.31-0.67, P < .001). Compared with PN, neither cryoablation nor RF/MW ablation showed significant difference in OS (cryoablation vs PN, HR = 1.35, 95% CI 0.80-2.28, P = .258; RF/MW ablation vs PN, HR = 0.64, 95% CI 0.95-2.55, P = .079). CONCLUSIONS Current SBRT protocols show lower OS compared with thermal ablation and PN, whereas thermal ablation and PN demonstrate comparable outcomes.
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Affiliation(s)
- Annemarie Uhlig
- Departments of Urology, University Medical Center Goettingen, Goettingen, Germany
| | - Johannes Uhlig
- Diagnostic and Interventional Radiology, University Medical Center Goettingen, Goettingen, Germany; Section of Interventional Radiology, Department of Radiology and Biomedical Imaging, Yale School of Medicine, 333 Cedar Street, New Haven, CT 06510
| | - Lutz Trojan
- Departments of Urology, University Medical Center Goettingen, Goettingen, Germany
| | - Hyun S Kim
- Section of Interventional Radiology, Department of Radiology and Biomedical Imaging, Yale School of Medicine, 333 Cedar Street, New Haven, CT 06510; Section of Medical Oncology, Department of Medicine, Yale School of Medicine, 333 Cedar Street, New Haven, CT 06510; Yale Cancer Center, Yale School of Medicine, 333 Cedar Street, New Haven, CT 06510.
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