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Ajithkumar T, Avanzo M, Yorke E, Tsang DS, Milano MT, Olch AJ, Merchant TE, Dieckmann K, Mahajan A, Fuji H, Paulino AC, Timmermann B, Marks LB, Bentzen SM, Jackson A, Constine LS. Brain and Brain Stem Necrosis After Reirradiation for Recurrent Childhood Primary Central Nervous System Tumors: A PENTEC Comprehensive Review. Int J Radiat Oncol Biol Phys 2024; 119:655-668. [PMID: 38300187 DOI: 10.1016/j.ijrobp.2023.12.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 12/19/2023] [Accepted: 12/26/2023] [Indexed: 02/02/2024]
Abstract
PURPOSE Reirradiation is increasingly used in children and adolescents/young adults (AYA) with recurrent primary central nervous system tumors. The Pediatric Normal Tissue Effects in the Clinic (PENTEC) reirradiation task force aimed to quantify risks of brain and brain stem necrosis after reirradiation. METHODS AND MATERIALS A systematic literature search using the PubMed and Cochrane databases for peer-reviewed articles from 1975 to 2021 identified 92 studies on reirradiation for recurrent tumors in children/AYA. Seventeen studies representing 449 patients who reported brain and brain stem necrosis after reirradiation contained sufficient data for analysis. While all 17 studies described techniques and doses used for reirradiation, they lacked essential details on clinically significant dose-volume metrics necessary for dose-response modeling on late effects. We, therefore, estimated incidences of necrosis with an exact 95% CI and qualitatively described data. Results from multiple studies were pooled by taking the weighted average of the reported crude rates from individual studies. RESULTS Treated cancers included ependymoma (n = 279 patients; 7 studies), medulloblastoma (n = 98 patients; 6 studies), any CNS tumors (n = 62 patients; 3 studies), and supratentorial high-grade gliomas (n = 10 patients; 1 study). The median interval between initial and reirradiation was 2.3 years (range, 1.2-4.75 years). The median cumulative prescription dose in equivalent dose in 2-Gy fractions (EQD22; assuming α/β value = 2 Gy) was 103.8 Gy (range, 55.8-141.3 Gy). Among 449 reirradiated children/AYA, 22 (4.9%; 95% CI, 3.1%-7.3%) developed brain necrosis and 14 (3.1%; 95% CI, 1.7%-5.2%) developed brain stem necrosis with a weighted median follow-up of 1.6 years (range, 0.5-7.4 years). The median cumulative prescription EQD22 was 111.4 Gy (range, 55.8-141.3 Gy) for development of any necrosis, 107.7 Gy (range, 55.8-141.3 Gy) for brain necrosis, and 112.1 Gy (range, 100.2-117 Gy) for brain stem necrosis. The median latent period between reirradiation and the development of necrosis was 5.7 months (range, 4.3-24 months). Though there were more events among children/AYA undergoing hypofractionated versus conventionally fractionated reirradiation, the differences were not statistically significant (P = .46). CONCLUSIONS Existing reports suggest that in children/AYA with recurrent brain tumors, reirradiation with a total EQD22 of about 112 Gy is associated with an approximate 5% to 7% incidence of brain/brain stem necrosis after a median follow-up of 1.6 years (with the initial course of radiation therapy being given with conventional prescription doses of ≤2 Gy per fraction and the second course with variable fractionations). We recommend a uniform approach for reporting dosimetric endpoints to derive robust predictive models of late toxicities following reirradiation.
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Affiliation(s)
- Thankamma Ajithkumar
- Department of Oncology, Cambridge University Hospitals, Cambridge, United Kingdom.
| | - Michele Avanzo
- Division of Medical Physics, Centro di Riferimento Oncologico Aviano IRCCS, Aviano, Italy
| | - Ellen Yorke
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Derek S Tsang
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Michael T Milano
- Department of Radiation Oncology, University of Rochester Medical Center, Rochester, New York
| | - Arthur J Olch
- Department of Radiation Oncology and Pediatrics, Children's Hospital Los Angeles, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Thomas E Merchant
- Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Karin Dieckmann
- Department of Radiation Oncology, Medical University of Vienna, Vienna, Austria
| | - Anita Mahajan
- Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota
| | - Hiroshi Fuji
- National Center for Child Health and Development, Tokyo, Japan
| | - Arnold C Paulino
- Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Beate Timmermann
- Department of Particle Therapy, University Hospital Essen, West German Proton Therapy Centre Essen, West German Cancer Center, Essen, Germany
| | - Lawrence B Marks
- Department of Radiation Oncology and Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, North Carolina
| | - Soren M Bentzen
- Division of Biostatistics and Bioinformatics, Department of Radiation Oncology, and University of Maryland Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland
| | - Andrew Jackson
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Louis S Constine
- Department of Radiation Oncology, University of Rochester Medical Center, Rochester, New York; Department of Pediatrics, University of Rochester Medical Center, Rochester, New York
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Giakoumettis G, Mantzavinou A, Moschos G, Giakoumettis D, Capizzello A. Re-irradiation of Pediatric Medulloblastoma: A Case Report and Systematic Review. Cureus 2022; 14:e31585. [DOI: 10.7759/cureus.31585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/14/2022] [Indexed: 11/17/2022] Open
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Cuccia F, Mortellaro G, Ognibene L, Craparo G, Lo Casto A, Ferrera G. Salvage Re-irradiation Options in Adult Medulloblastoma: A Case Report and Review of the Literature. In Vivo 2020; 34:1283-1288. [PMID: 32354920 DOI: 10.21873/invivo.11903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 01/25/2020] [Accepted: 01/29/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND/AIM Medulloblastoma is a rare tumor of adult age, while it occurs more frequently in children. Given the rarity, there is a lack of evidence for the treatment of recurrent disease. Few data are available about salvage re-irradiation collecting very heterogeneous series. CASE REPORT A 51-year-old male presented with headache, nausea, double vision, and gait disorders. A contrast-enhanced brain-MRI showed the presence of multifocal medulloblastoma. After surgery, adjuvant craniospinal radiotherapy was performed, chemotherapy was stopped due to toxicity. After 27 months, a new MRI and a Methionine-PET revealed a late pontocerebellar relapse; multidisciplinary board decided for a SBRT treatment. The second course of RT was well tolerated and 14 months later, the patient is alive in good general conditions, with no evidence of disease. CONCLUSION Our experience supports the use of salvage stereotactic radiotherapy as a safe and effective treatment option.
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Affiliation(s)
- Francesco Cuccia
- Radiation Oncology School, University of Palermo, Palermo, Italy .,Advanced Radiation Oncology Department, IRCCS Sacro Cuore Don Calabria Hospital, Verona, Italy
| | | | - Lucia Ognibene
- Radiotherapy Unit, San Gaetano Radiotherapy and Nuclear Medicine Center, Palermo, Italy
| | | | - Antonio Lo Casto
- Radiation Oncology School, University of Palermo - Section of Radiology - Di.Bi.Med., Palermo, Italy
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Tsang DS, Sarhan N, Ramaswamy V, Nobre L, Yee R, Taylor MD, Hawkins C, Bartels U, Huang A, Tabori U, Hodgson DC, Bouffet E, Laperriere N. Re-irradiation for children with recurrent medulloblastoma in Toronto, Canada: a 20-year experience. J Neurooncol 2019; 145:107-114. [DOI: 10.1007/s11060-019-03272-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 08/22/2019] [Indexed: 12/25/2022]
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Radiotherapy Advances in Paediatric Medulloblastoma Treatment. Clin Oncol (R Coll Radiol) 2019; 31:171-181. [DOI: 10.1016/j.clon.2019.01.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 12/21/2018] [Accepted: 01/03/2019] [Indexed: 12/19/2022]
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Tsang D, Laperriere N. Re-irradiation for Paediatric Tumours. Clin Oncol (R Coll Radiol) 2019; 31:191-198. [DOI: 10.1016/j.clon.2018.10.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 05/29/2018] [Accepted: 06/11/2018] [Indexed: 12/25/2022]
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Radiosurgery or hypofractionated stereotactic radiotherapy after craniospinal irradiation in children and adults with medulloblastoma and ependymoma. Childs Nerv Syst 2019; 35:267-275. [PMID: 30515559 PMCID: PMC6351705 DOI: 10.1007/s00381-018-4010-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 11/20/2018] [Indexed: 11/22/2022]
Abstract
PURPOSE To assess the results and tolerance of radiosurgery/hypofractionated stereotactic radiotherapy performed after craniospinal irradiation for recurrent tumor. METHODS Fourteen patients aged 3-46 years, diagnosed with medulloblastoma (10), anaplastic ependymoma (3), and primitive neuroectodermal tumor (1). All patients had craniospinal irradiation (CSI) with the total dose of 30.6-36 Gy and boost to 53.9-60 Gy either during primary or during second-line treatment. Twelve patients were irradiated with a single dose of 6-15 Gy (median 14.5 Gy). One received three fractions of 5 Gy and one six fractions of 5 Gy. In statistical analysis, the Kaplan-Meier method and log-rank test were used. The overall survival was calculated from the date of the end of stereotactic radiosurgery to the date of death or last contact. RESULTS Recurrences were diagnosed after the median time of 16 months after the end of primary treatment. Eleven patients died during the follow-up. The follow-up for the 3 patients still alive was 6.7, 40.5, and 41.4 months, respectively. One- and 2-year overall survival (OS) was 70% and 39%. Patients who had ECOG performance status of 0 at the time of diagnosis of the disease trended to have better 2-year OS compared to those evaluated as ECOG 1 (p = 0.057). Treatment results were evaluable in 12 patients. Local control (stabilization or regression of the lesion) was achieved in 9 (75%). Overall disease progression was 67%. No patient developed radiation-induced necrosis. The treatment was well tolerated and no serious adverse effects were observed. Eleven patients were given steroids as a prevention of brain edema and four of them needed continuation of this treatment afterwards. In 7 patients, symptoms of brain edema were observed during the first weeks after reirradiation. CONCLUSIONS Stereotactic radiosurgery or hypofractionated stereotactic radiotherapy is an effective treatment method of the local recurrence after CSI and can be performed safely in heavily pre-treated patients.
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Rao AD, Rashid AS, Chen Q, Villar RC, Kobyzeva D, Nilsson K, Dieckmann K, Nechesnyuk A, Ermoian R, Alcorn S, MacDonald SM, Ladra MM, Ford EC, Winey BA, Figueiredo MLS, Chen MJ, Terezakis SA. Reirradiation for Recurrent Pediatric Central Nervous System Malignancies: A Multi-institutional Review. Int J Radiat Oncol Biol Phys 2017; 99:634-641. [PMID: 29280457 DOI: 10.1016/j.ijrobp.2017.07.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Revised: 06/13/2017] [Accepted: 07/22/2017] [Indexed: 11/26/2022]
Abstract
PURPOSE Reirradiation has been proposed as an effective modality for recurrent central nervous system (CNS) malignancies in adults. We evaluated the toxicity and outcomes of CNS reirradiation in pediatric patients. METHODS AND MATERIALS The data from pediatric patients <21 years of age at the initial diagnosis who developed a recurrent CNS malignancy that received repeat radiation therapy (RT) across 5 facilities in an international pediatric research consortium were retrospectively reviewed. RESULTS Sixty-seven pediatric patients underwent CNS reirradiation. The primary diagnoses included medulloblastoma/primitive neuroectodermal tumor (n=20; 30%), ependymoma (n=19; 28%), germ cell tumor (n=8; 12%), high-grade glioma (n=9; 13%), low-grade glioma (n=5; 7%), and other (n=6; 9%). The median age at the first course of RT was 8.5 years (range 0.5-19.5) and was 12.3 years (range 3.3-30.2) at reirradiation. The median interval between RT courses was 2.0 years (range 0.3-16.5). The median radiation dose and fractionation in equivalent 2-Gy fractions was 63.7 Gy (range 27.6-74.8) for initial RT and 53.1 Gy (range 18.6-70.1) for repeat RT. The relapse location was infield in 52 patients (78%) and surrounding the initial RT field in 15 patients (22%). Thirty-seven patients (58%) underwent gross or subtotal resection at recurrence. The techniques used for reirradiation were intensity modulated RT (n=46), 3-dimensional conformal RT (n=9), stereotactic radiosurgery (n=4; 12-13 Gy × 1 or 5 Gy × 5), protons (n=4), combined modality (n=3), 2-dimensional RT (n=1), and brachytherapy (n=1). Radiation necrosis was detected in 2 patients after the first RT course and 1 additional patient after reirradiation. Six patients (9%) developed secondary neoplasms after initial RT (1 hematologic, 5 intracranial). One patient developed a secondary neoplasm identified shortly after repeat RT. The median overall survival after completion of repeat RT was 12.8 months for the entire cohort and 20.5 and 8.4 months for patients with recurrent ependymoma and medulloblastoma after reirradiation, respectively. CONCLUSIONS CNS reirradiation in pediatric patients could be a reasonable treatment option, with moderate survival noted after repeat RT. However, prospective data characterizing the rates of local control and toxicity are needed.
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Affiliation(s)
- Avani D Rao
- Department of Radiation and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Arif S Rashid
- Department of Radiation and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Qinyu Chen
- Department of Radiation and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Rosangela C Villar
- Department of Radiation Oncology, Centro Infantil Boldrini, São Paulo, Brazil
| | - Daria Kobyzeva
- Department of Radiation Oncology, Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Moscow, Russia
| | - Kristina Nilsson
- Department of Radiation Oncology, Uppsala University Hospital, Uppsala, Sweden
| | - Karin Dieckmann
- Department of Radiation Oncology, Universitätklinik Für Strahlentherapie und Strahlenbiologie, Wien, Germany
| | - Alexey Nechesnyuk
- Department of Radiation Oncology, Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Moscow, Russia
| | - Ralph Ermoian
- Department of Radiation Oncology, University of Washington, Seattle, Washington
| | - Sara Alcorn
- Department of Radiation and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Shannon M MacDonald
- Department of Radiation Oncology, Massachusetts General Hospital, Boston, Massachusetts
| | - Matthew M Ladra
- Department of Radiation and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Eric C Ford
- Department of Radiation Oncology, University of Washington, Seattle, Washington
| | - Brian A Winey
- Department of Radiation Oncology, Massachusetts General Hospital, Boston, Massachusetts
| | - Maria Luisa S Figueiredo
- Department of Radiation Oncology, Grupo de Apoio ao Adolescente e à Criança com Câncer, São Paulo, Brazil
| | - Michael J Chen
- Department of Radiation Oncology, Grupo de Apoio ao Adolescente e à Criança com Câncer, São Paulo, Brazil
| | - Stephanie A Terezakis
- Department of Radiation and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center Johns Hopkins School of Medicine, Baltimore, Maryland.
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Gultekin M, Cengiz M, Sezen D, Zorlu F, Yildiz F, Yazici G, Hurmuz P, Ozyigit G, Akyol F, Gurkaynak M. Reirradiation of Pediatric Tumors Using Hypofractionated Stereotactic Radiotherapy. Technol Cancer Res Treat 2016; 16:195-202. [PMID: 27352857 DOI: 10.1177/1533034616655952] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND This study aimed to evaluate the efficacy and safety of hypofractionated stereotactic radiotherapy for reirradiation of recurrent pediatric tumors. METHODS AND MATERIALS The study included 23 pediatric patients who were reirradiated using hypofractionated stereotactic radiotherapy in the radiation oncology department between January 2008 and November 2013. In total, 33 tumors were treated-27 (82%) cranial and 6 (18%) extracranial. Hypofractionated stereotactic radiotherapy was administered due to recurrent disease in 31 (94%) tumors and residual disease in 2 (6%) tumors. The median total dose was 25 Gy (range: 15-40 Gy), and the median follow-up was 20 months (range: 2-68 months). RESULTS The 1-year and 2-year local control rates in the entire study population were 42% and 31%, respectively. The median local control time was 11 months (range: 0-54 months) following hypofractionated stereotactic radiotherapy. The patients with tumor response after hypofractionated stereotactic radiotherapy had significantly longer local control than the patients with post-hypofractionated stereotactic radiotherapy tumor progression (21 vs 3 months, P < .001). Tumor volume <1.58 cm3 was correlated (not significantly) with better local control (23 vs 7 months, P = .064). CONCLUSION Reirradiation of pediatric tumors using hypofractionated stereotactic radiotherapy is a safe and effective therapeutic approach. This treatment modality should be considered as a treatment option in selected pediatric patients.
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Affiliation(s)
- Melis Gultekin
- 1 Department of Radiation Oncology, School of Medicine, Hacettepe University, Ankara, Turkey
| | - Mustafa Cengiz
- 1 Department of Radiation Oncology, School of Medicine, Hacettepe University, Ankara, Turkey
| | - Duygu Sezen
- 2 Department of Radiation Oncology, School of Medicine, Koç University, Istanbul, Turkey
| | - Faruk Zorlu
- 1 Department of Radiation Oncology, School of Medicine, Hacettepe University, Ankara, Turkey
| | - Ferah Yildiz
- 1 Department of Radiation Oncology, School of Medicine, Hacettepe University, Ankara, Turkey
| | - Gozde Yazici
- 1 Department of Radiation Oncology, School of Medicine, Hacettepe University, Ankara, Turkey
| | - Pervin Hurmuz
- 1 Department of Radiation Oncology, School of Medicine, Hacettepe University, Ankara, Turkey
| | - Gokhan Ozyigit
- 1 Department of Radiation Oncology, School of Medicine, Hacettepe University, Ankara, Turkey
| | - Fadil Akyol
- 1 Department of Radiation Oncology, School of Medicine, Hacettepe University, Ankara, Turkey
| | - Murat Gurkaynak
- 1 Department of Radiation Oncology, School of Medicine, Hacettepe University, Ankara, Turkey
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Metachronous medulloblastoma and glioblastoma: Implications for clinical and technical aspects of re-irradiation. Rep Pract Oncol Radiother 2015; 21:84-9. [PMID: 26900364 DOI: 10.1016/j.rpor.2015.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Revised: 07/24/2015] [Accepted: 10/15/2015] [Indexed: 12/25/2022] Open
Abstract
A seven-year-old male underwent surgical resection and chemoradiation for average risk medulloblastoma; twelve years later, the presence of a necrotic and infiltrative mass in the same area and invading the brainstem prompted a subtotal resection. Pathology was indicative of glioblastoma. He was then treated with concurrent temozolomide and using biologically effective dose calculations for gross residual tumor tissue in the brainstem as well as brainstem tolerance, a radiotherapy dose of 3750 cGy was chosen, fractionated in twice-daily fractions of 125 cGy each. The gross tumor volume was expanded with a 5 mm margin to the planning target volume, which was also judiciously subtracted from the normal brainstem. He completed his radiotherapy course with subsequent imaging free of residual tumor and continued adjuvant temozolomide and remains under follow-up surveillance. This case underscores the rarity of metachronous medulloblastoma and glioblastoma, of which only five known cases heretofore have been described. We discuss the technicalities of radiotherapy planning in this patient, including common hurdles for radiation oncologists in similar patients.
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Bandurska-Luque A, Piotrowski T, Skrobała A, Ryczkowski A, Adamska K, Kaźmierska J. Prospective study on dosimetric comparison of helical tomotherapy and 3DCRT for craniospinal irradiation - A single institution experience. Rep Pract Oncol Radiother 2015; 20:145-52. [PMID: 25859405 PMCID: PMC4338290 DOI: 10.1016/j.rpor.2014.12.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 10/28/2014] [Accepted: 12/11/2014] [Indexed: 10/24/2022] Open
Abstract
AIM This prospective study aims to assess feasibility of helical tomotherapy (HT) for craniospinal irradiation (CSI) and perform dosimetric comparison of treatment plans for both HT and 3D conformal radiotherapy (3DCRT). BACKGROUND CSI is a challenging procedure. Large PTV size requires field matching due to technical limitations of standard linear accelerators, which cannot irradiate such volumes as a single field. HT could help to avoid these limitations as irradiation of long fields is possible without field matching. MATERIALS AND METHODS Three adults were enrolled from 2009 to 2010. All patients received radiochemotherapy. Treatment plans in prone position for 3DCRT and in supine position for HT were generated. The superior plan was used for patients' irradiation. Plans were compared with the application of DVH, Dx parameters - where x represents a percentage of the structure volume receiving a normalized dose and homogeneity index (HI). RESULTS All patients received HT irradiation. The treatment was well tolerated. The HT plans resulted in a better dose coverage and uniformity in the PTV: HI were 5.4, 7.8, 6.8 for HT vs. 10.3, 6.6, 10.4 for 3DCRT. For most organs at risk (OARs), the D(V80) was higher for HT than for 3DCRT, whereas D(V5) was lower for HT. CONCLUSIONS HT is feasible for CSI, and in comparison with 3DCRT it improves PTV coverage. HT reduces high dose volumes of OARs, but larger volumes of normal tissue receive low radiation dose. HT requires further study to establish correlations between dosimetrical findings and clinical outcomes, especially with regard to late sequelae of treatment.
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Affiliation(s)
| | - Tomasz Piotrowski
- Department of Electroradiology, University of Medical Sciences, Poznań, Poland
- Medical Physics Department, Greater Poland Cancer Centre, Poznań, Poland
| | - Agnieszka Skrobała
- Department of Electroradiology, University of Medical Sciences, Poznań, Poland
- Medical Physics Department, Greater Poland Cancer Centre, Poznań, Poland
| | - Adam Ryczkowski
- Medical Physics Department, Greater Poland Cancer Centre, Poznań, Poland
| | - Krystyna Adamska
- Radiotherapy Department III, Greater Poland Cancer Centre, Poznań, Poland
| | - Joanna Kaźmierska
- Radiotherapy Department II, Greater Poland Cancer Centre, Poznań, Poland
- Department of Electroradiology, University of Medical Sciences, Poznań, Poland
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Beam orientation in stereotactic radiosurgery using an artificial neural network. Radiother Oncol 2014; 111:296-300. [DOI: 10.1016/j.radonc.2014.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 03/16/2014] [Accepted: 03/19/2014] [Indexed: 01/06/2023]
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Abstract
BACKGROUND Glioblastoma is the most common primary brain tumour. It has a poor prognosis despite some advances in treatment that have been achieved over the last ten years. In Slovenia, 50 to 60 glioblastoma patients are diagnosed each year. In order to establish whether the current treatment options have any influence on the survival of the Slovenian glioblastoma patients, their data in the period from the beginning of the year 1997 to the end of the year 2008 have been analysed. PATIENTS AND METHODS All patients treated at the Institute of Oncology Ljubljana from 1997 to 2008 were included in the retrospective study. Demographics, treatment details, and survival time after the diagnosis were collected and statistically analysed for the group as a whole and for subgroups. RESULTS From 1997 to 2008, 527 adult patients were diagnosed with glioblastoma and referred to the Institute of Oncology for further treatment. Their median age was 59 years (from 20 to 85) and all but one had the diagnosis confirmed by a pathologist. Gross total resection was reported by surgeons in 261 (49.5%) patients; good functional status (WHO 0 or 1) after surgery was observed in 336 (63.7%) patients, radiotherapy was performed in 422 (80.1%) patients, in 317 (75.1%) of them with radical intent, and 198 (62.5 %) of those received some form of systemic treatment (usually temozolomide). The median survival of all patients amounted to 9.7 months. There was no difference in median survival of all patients or of all treated patients before or after the chemo-radiotherapy era. However, the overall survival of patients treated with radical intent was significantly better (11.4 months; p < 0.05). A better survival was also noticed in radically treated patients who received additional temozolomide therapy (11.4 vs. 13.1 months; p = 0.014). The longer survival was associated with a younger age and a good performance status as well as with a more extensive tumour resection. In patients treated with radical intent, having a good performance status, and receiving radiotherapy and additional temozolomide therapy, the survival was significantly longer, based on multivariate analysis. CONCLUSIONS We observed a gradual increase in the survival of glioblastoma patients who were treated with radical intent over the last ten years. Good functional surgery, advances in radiotherapy and addition of temozolomide all contributed to this increase. Though the increased survival seems to be more pronounced in certain subgroups, we have still not been able to exactly define them. Further research, especially in tumour biology and genetics is needed.
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Alongi F, Clerici E, Pentimalli S, Mancosu P, Scorsetti M. Initial experience of hypofractionated radiation retreatment with true beam and flattening filter free beam in selected case reports of recurrent nasopharyngeal carcinoma. Rep Pract Oncol Radiother 2012; 17:262-8. [PMID: 24669306 DOI: 10.1016/j.rpor.2012.07.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2011] [Revised: 04/30/2012] [Accepted: 07/17/2012] [Indexed: 10/28/2022] Open
Abstract
AIM To show our preliminary experience in using TrueBeam with RapidArc technology and FFF beam for stereotactic re-irradiation of nasopharyngeal carcinoma. BACKGROUND Thanks to new advanced techniques, as well as intensity modulated radiation therapy, it is possible to approach head and neck recurrences in selected patients. Volumetric Modulated Arc Therapy (VMAT) in its RapidArc(®) format, permits to reduce significantly the time to deliver complex intensity modulated plans, allowing to treat hypofractionated regimes within a few minutes. With TrueBeam it is possible to perform photon beams without usage of the flattening filter. It seems possible to expect a reduction of out-of-field dose when flattening filter free (FFF) beams are used. While research into the physics domain for FFF beams is increasing, there are very few clinical data where FFF beams are applied in clinical practice. MATERIALS AND METHODS We present here the cases of 4 patients with local or regional recurrence of nasopharyngeal carcinoma. All patients were treated using TrueBeam with RapidArc technology and FFF beam for stereotactic hypofractionated re-irradiation. RESULTS All patients concluded SBRT and showed good tolerability. During follow-up, complete response at imaging evaluation (PET and/or MRI) for all treated patients was documented. CONCLUSIONS Our preliminary experience using TrueBeam with RapidArc technology and FFF beam for stereotactic hypofractionated re-irradiation of nasopharyngeal carcinoma was safe and effective in all 4 treated patients. Longer follow-up and a larger population of study is needed to confirm these promising results.
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Affiliation(s)
- Filippo Alongi
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, Istituto Clinico Humanitas, Via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Elena Clerici
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, Istituto Clinico Humanitas, Via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Sara Pentimalli
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, Istituto Clinico Humanitas, Via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Pietro Mancosu
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, Istituto Clinico Humanitas, Via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Marta Scorsetti
- Radiotherapy and Radiosurgery Department, Humanitas Cancer Center, Istituto Clinico Humanitas, Via Manzoni 56, 20089 Rozzano, Milan, Italy
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