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Kilic Durankus N, Samanci Y, Düzkalir AH, Peker S. Unveiling the Efficacy of Gamma Knife Radiosurgery for Tectal Plate Gliomas. Neurosurgery 2024; 94:780-787. [PMID: 37955438 DOI: 10.1227/neu.0000000000002754] [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: 07/03/2023] [Accepted: 09/21/2023] [Indexed: 11/14/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Tectal plate gliomas (TPGs) are midbrain tumors that grow slowly and have a benign clinical course. Most TPGs are low-grade astrocytomas, but they can encompass various histological tumor types. Gamma Knife radiosurgery (GKRS) is being explored as a potentially safe and effective treatment option for TPGs, although research in this area is limited. This study aims to evaluate GKRS's efficacy and safety in patients with TPG and provide a comprehensive review of existing literature on the topic. METHODS This retrospective, single-center study included 48 patients with consecutive TPG who underwent GKRS between September 2005 and June 2022. Patients diagnosed with TPGs based on radiological or tissue-based criteria and who had a minimum follow-up period of 12 months were eligible for inclusion. The primary end points were local control and the absence of GKRS-associated or tumor-associated mortality and morbidity. RESULTS During a median follow-up of 28.5 months (range, 12-128), the radiological assessment showed tumor control in all cases, with 16.7% achieving a complete response and 68.8% achieving a partial response. Pseudoprogression occurred in 6.2% of cases, with onset ranging from 3 to 8 months. Clinical outcomes revealed no permanent neurological deterioration, with symptoms improving in 14.6% of patients and remaining stable in the others. One patient in the pseudoprogression group experienced transient Parinaud syndrome. One patient died during follow-up because of unrelated causes. The mean survival time after GKRS was 123.7 months. None of the clinical, radiological, or radiosurgical variables showed a correlation with partial/complete response, clinical improvement, or overall survival. CONCLUSION There is limited research available on the management of TPGs, and this study presents the largest patient cohort treated with GKRS, along with a substantial follow-up duration. Despite its limitations, this study demonstrates the efficacy and low-risk profile of GKRS for TPGs.
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Affiliation(s)
| | - Yavuz Samanci
- Department of Neurosurgery, Koc University School of Medicine, Istanbul , Turkey
- Department of Neurosurgery, Gamma Knife Center, Koc University Hospital, Istanbul , Turkey
| | - Ali Haluk Düzkalir
- Department of Neurosurgery, Gamma Knife Center, Koc University Hospital, Istanbul , Turkey
| | - Selcuk Peker
- Department of Neurosurgery, Koc University School of Medicine, Istanbul , Turkey
- Department of Neurosurgery, Gamma Knife Center, Koc University Hospital, Istanbul , Turkey
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2
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Liu KX, Haas-Kogan DA, Elhalawani H. Radiotherapy for Primary Pediatric Central Nervous System Malignancies: Current Treatment Paradigms and Future Directions. Pediatr Neurosurg 2023; 58:356-366. [PMID: 37703864 DOI: 10.1159/000533777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Accepted: 08/21/2023] [Indexed: 09/15/2023]
Abstract
BACKGROUND Central nervous system tumors are the most common solid tumors in childhood. Treatment paradigms for pediatric central nervous system malignancies depend on elements including tumor histology, age of patient, and stage of disease. Radiotherapy is an important modality of treatment for many pediatric central nervous system malignancies. SUMMARY While radiation contributes to excellent overall survival rates for many patients, radiation also carries significant risks of long-term side effects including neurocognitive decline, hearing loss, growth impairment, neuroendocrine dysfunction, strokes, and secondary malignancies. In recent decades, clinical trials have demonstrated that with better imaging and staging along with more sophisticated radiation planning and treatment set-up verification, smaller treatment volumes can be utilized without decrement in survival. Furthermore, the development of intensity-modulated radiotherapy and proton-beam radiotherapy has greatly improved conformality of radiation. KEY MESSAGES Recent changes in radiation treatment paradigms have decreased risks of short- and long-term toxicity for common histologies and in different age groups. Future studies will continue to develop novel radiation regimens to improve outcomes in aggressive central nervous system tumors, integrate molecular subtypes to tailor radiation treatment, and decrease radiation-associated toxicity for long-term survivors.
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Affiliation(s)
- Kevin X Liu
- Department of Radiation Oncology, Brigham and Women's Hospital/Dana-Farber Cancer Institute, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Daphne A Haas-Kogan
- Department of Radiation Oncology, Brigham and Women's Hospital/Dana-Farber Cancer Institute, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Hesham Elhalawani
- Department of Radiation Oncology, Brigham and Women's Hospital/Dana-Farber Cancer Institute, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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3
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Abramian D, Blystad I, Eklund A. Evaluation of inverse treatment planning for gamma knife radiosurgery using fMRI brain activation maps as organs at risk. Med Phys 2023; 50:5297-5311. [PMID: 37531209 DOI: 10.1002/mp.16660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 05/22/2023] [Accepted: 06/27/2023] [Indexed: 08/03/2023] Open
Abstract
BACKGROUND Stereotactic radiosurgery (SRS) can be an effective primary or adjuvant treatment option for intracranial tumors. However, it carries risks of various radiation toxicities, which can lead to functional deficits for the patients. Current inverse planning algorithms for SRS provide an efficient way for sparing organs at risk (OARs) by setting maximum radiation dose constraints in the treatment planning process. PURPOSE We propose using activation maps from functional MRI (fMRI) to map the eloquent regions of the brain and define functional OARs (fOARs) for Gamma Knife SRS treatment planning. METHODS We implemented a pipeline for analyzing patient fMRI data, generating fOARs from the resulting activation maps, and loading them onto the GammaPlan treatment planning software. We used the Lightning inverse planner to generate multiple treatment plans from open MRI data of five subjects, and evaluated the effects of incorporating the proposed fOARs. RESULTS The Lightning optimizer designs treatment plans with high conformity to the specified parameters. Setting maximum dose constraints on fOARs successfully limits the radiation dose incident on them, but can have a negative impact on treatment plan quality metrics. By masking out fOAR voxels surrounding the tumor target it is possible to achieve high quality treatment plans while controlling the radiation dose on fOARs. CONCLUSIONS The proposed method can effectively reduce the radiation dose incident on the eloquent brain areas during Gamma Knife SRS of brain tumors.
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Affiliation(s)
- David Abramian
- Division of Medical Informatics, Department of Biomedical Engineering, Linköping University, Linköping, Sweden
- Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden
| | - Ida Blystad
- Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden
- Department of Radiology in Linköping and Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| | - Anders Eklund
- Division of Medical Informatics, Department of Biomedical Engineering, Linköping University, Linköping, Sweden
- Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden
- Division of Statistics & Machine Learning, Department of Computer and Information Science, Linköping University, Linköping, Sweden
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4
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Dong MJ, Yang ZK, Yang J, Guo RQ, Xiao YY, Liu H. Gamma knife radiotherapy in a neurofibromatosis type 1 Chinese pedigrees with NF1 gene frameshift mutation: A case report. Medicine (Baltimore) 2022; 101:e29280. [PMID: 35801779 PMCID: PMC9259110 DOI: 10.1097/md.0000000000029280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
RATIONALE Neurofibromatosis type 1 (NF1) is a common autosomal dominant genetic disorder. NF1 is a multisystemic disease and its pathogenesis involves mutations in the NF1 gene on chromosome 17q11.2 causing RAS overactivation to stimulate abnormal cell proliferation. In this article, a Chinese family with neurofibromatosis type 1 was reported and the relationship between the phenotype and gene mutation was analyzed. PATIENT CONCERNS The patient was a 9-year-old-male child diagnosed with right eye exophthalmos combined with right eye glioma, optic edema, and peripheral visual field defect. There were multiple cafe-au-lait spots in the whole body of the child. His mother had multiple cafe-au-lait spots, and the eye examination showed no abnormalities. DIAGNOSIS The proband was diagnosed with NF1 and a heterozygous frameshift mutation (c. 6641delG p. Arg2214Asnfs*30) in the NF1 gene was identified, and his mother also carried the same pathogenic mutation. INTERVENTIONS To protect the vision of the right eye, he was treated with gamma knife radiotherapy. OUTCOMES After therapy, his fundus optic disc edema was decreased and the best corrected visual acuity of the right eye was increased. LESSONS Gene detection is helpful to diagnose the disease and guide the treatment. Gamma knife radiotherapy can preserve better neurological function.
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Affiliation(s)
- Meng-Jie Dong
- Department of Ophthalmology, The Affiliated Hospital of Yunnan University, The Second People’s Hospital of Yunnan Province, Kunming, China
- The Eye Disease Clinical Medical Research Center of Yunnan Province, Kunming, China
- The Eye Disease Clinical Medical Center of Yunnan Province, Kunming, China
| | - Zhong-Kun Yang
- Department of Ophthalmology, The Affiliated Hospital of Yunnan University, The Second People’s Hospital of Yunnan Province, Kunming, China
- The Eye Disease Clinical Medical Research Center of Yunnan Province, Kunming, China
- The Eye Disease Clinical Medical Center of Yunnan Province, Kunming, China
| | - Ji Yang
- Department of Ophthalmology, The Affiliated Hospital of Yunnan University, The Second People’s Hospital of Yunnan Province, Kunming, China
- The Eye Disease Clinical Medical Research Center of Yunnan Province, Kunming, China
- The Eye Disease Clinical Medical Center of Yunnan Province, Kunming, China
| | - Rui-Qin Guo
- Department of Ophthalmology, The Affiliated Hospital of Yunnan University, The Second People’s Hospital of Yunnan Province, Kunming, China
- The Eye Disease Clinical Medical Research Center of Yunnan Province, Kunming, China
- The Eye Disease Clinical Medical Center of Yunnan Province, Kunming, China
| | - Yu-Yuan Xiao
- Department of Ophthalmology, The Affiliated Hospital of Yunnan University, The Second People’s Hospital of Yunnan Province, Kunming, China
- The Eye Disease Clinical Medical Research Center of Yunnan Province, Kunming, China
- The Eye Disease Clinical Medical Center of Yunnan Province, Kunming, China
| | - Hai Liu
- Department of Ophthalmology, The Affiliated Hospital of Yunnan University, The Second People’s Hospital of Yunnan Province, Kunming, China
- The Eye Disease Clinical Medical Research Center of Yunnan Province, Kunming, China
- The Eye Disease Clinical Medical Center of Yunnan Province, Kunming, China
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Mishra H, Pahwa B, Agrawal D, M Ch MS, M Ch SSK. Gamma knife radiosurgery as an efficacious treatment for paediatric central nervous system tumours: a retrospective study of 61 neoplasms. Childs Nerv Syst 2022; 38:909-918. [PMID: 35290486 DOI: 10.1007/s00381-022-05463-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 01/17/2022] [Indexed: 11/26/2022]
Abstract
PURPOSE Brain tumours have an incidence of 1.15 to 5.14 cases per 100,000 children and are associated with significant morbidity and mortality. Radiosurgery has become a promising approach to manage these paediatric CNS tumours. The aim of the present study was to analyse the efficacy of radiosurgery in the treatment of a variety of paediatric tumours of CNS. METHODS This retrospective study was conducted from 1997 to 2012 at a single Neurosurgery centre. All paediatric patients (≤ 18 years of age) with CNS tumours who were treated with gamma knife radiosurgery (GKRS) and had a minimum follow up of 6 months were included in the study. Patients with lesions other than tumours were excluded. Clinical, radiological and GKRS planning data was collected and analysed in all patients. RESULTS A total of 76 children with brain tumours had GKRS during the study period. Of these, 40 children (with 61 neoplasms) had follow-up available and were included in the study. The mean age was 16 years (6-18 years). Seventeen patients received primary GKRS, 20 patients received secondary, and 3 patients received both. The median tumour volume was 3.3 cm3 (0.14-38.9 cm3). The mean dose was 12.56 Gy at 50% isodose line. The majority of the tumours were meningioma (n = 20) followed by acoustic schwannoma (n = 17). The mean treatment time was 67.04 min. Thirty-three tumours responded favourably to GKRS, 24 showed a stable size, 3 had no response while 1 progressed, requiring surgery. CONCLUSION GKRS has the potential to become an indispensable tool in the management of paediatric brain neoplasms.
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Affiliation(s)
- Harshit Mishra
- Consultant Neurosurgeon, We Care Hospital, Raipur, Chhattisgarh, India
| | - Bhavya Pahwa
- University College of Medical Sciences and GTB Hospital, Delhi, India
| | - Deepak Agrawal
- Department of Neurosurgery, JPNA Trauma Center, All India Institute of Medical Sciences, New Delhi, 110029, India.
| | - Manmohan Singh M Ch
- Department of Neurosurgery, JPNA Trauma Center, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - S S Kale M Ch
- Department of Neurosurgery, JPNA Trauma Center, All India Institute of Medical Sciences, New Delhi, 110029, India
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6
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Tripathi M, Deora H, Tripathi S, Ballari N. Role of gamma knife radiosurgery in the management of intracranial pathologies of pediatric population: Current concepts, limitations, and future directions. J Pediatr Neurosci 2022. [DOI: 10.4103/jpn.jpn_51_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Gagliardi F, De Domenico P, Snider S, Pompeo E, Roncelli F, Barzaghi LR, Bailo M, Piloni M, Spina A, Fodor A, Berzero G, Di Muzio N, Filippi M, Finocchiaro G, Mortini P. Gamma Knife radiosurgery as primary treatment of low-grade brainstem gliomas: A systematic review and metanalysis of current evidence and predictive factors. Crit Rev Oncol Hematol 2021; 168:103508. [PMID: 34678323 DOI: 10.1016/j.critrevonc.2021.103508] [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: 05/21/2021] [Revised: 10/05/2021] [Accepted: 10/10/2021] [Indexed: 10/20/2022] Open
Abstract
The current standard of care for surgically inaccessible low-grade brainstem gliomas (BS-LLGs) is external-beam radiotherapy (RT). Developments toward more innovative conformal techniques have focused on decreasing morbidity, by limiting radiation to surrounding tissues. Among these Gamma Knife radiosurgery (SRS-GK) has recently gained an increasingly important role in the treatment of these tumors. Although SRS-GK has not yet been compared with conventional RT in patients harboring focal BS-LGGs, clinical practice has been deeply influenced by trials performed on other tumors. This is the first meta-analysis on the topic, systematically reviewing the most relevant available evidence, comparing RT and SRS-GK as primary treatments of BS-LGGs, focusing on survival, clinical outcome, oncological control, and complications. Predictive factors have been systematically evaluated and analyzed according to statistical significance and clinical relevance.
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Affiliation(s)
- Filippo Gagliardi
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy.
| | - Pierfrancesco De Domenico
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Silvia Snider
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Edoardo Pompeo
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Francesca Roncelli
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Lina Raffaella Barzaghi
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Michele Bailo
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Martina Piloni
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Alfio Spina
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Andrei Fodor
- Department of Radiation Oncology, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Giulia Berzero
- Department of Neurology, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Nadia Di Muzio
- Department of Radiation Oncology, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Massimo Filippi
- Department of Neurology, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Gaetano Finocchiaro
- Department of Neurology, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Pietro Mortini
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
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8
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Sager O, Dincoglan F, Demiral S, Uysal B, Gamsiz H, Colak O, Ozcan F, Gundem E, Elcim Y, Dirican B, Beyzadeoglu M. Concise review of stereotactic irradiation for pediatric glial neoplasms: Current concepts and future directions. World J Methodol 2021; 11:61-74. [PMID: 34026579 PMCID: PMC8127424 DOI: 10.5662/wjm.v11.i3.61] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 04/07/2021] [Accepted: 04/14/2021] [Indexed: 02/06/2023] Open
Abstract
Brain tumors, which are among the most common solid tumors in childhood, remain a leading cause of cancer-related mortality in pediatric population. Gliomas, which may be broadly categorized as low grade glioma and high grade glioma, account for the majority of brain tumors in children. Expectant management, surgery, radiation therapy (RT), chemotherapy, targeted therapy or combinations of these modalities may be used for management of pediatric gliomas. Several patient, tumor and treatment-related characteristics including age, lesion size, grade, location, phenotypic and genotypic features, symptomatology, predicted outcomes and toxicity profile of available therapeutic options should be considered in decision making for optimal treatment. Management of pediatric gliomas poses a formidable challenge to the physicians due to concerns about treatment induced toxicity. Adverse effects of therapy may include neurological deficits, hemiparesis, dysphagia, ataxia, spasticity, endocrine sequelae, neurocognitive and communication impairment, deterioration in quality of life, adverse socioeconomic consequences, and secondary cancers. Nevertheless, improved understanding of molecular pathology and technological advancements may pave the way for progress in management of pediatric glial neoplasms. Multidisciplinary management with close collaboration of disciplines including pediatric oncology, surgery, and radiation oncology is warranted to achieve optimal therapeutic outcomes. In the context of RT, stereotactic irradiation is a viable treatment modality for several central nervous system disorders and brain tumors. Considering the importance of minimizing adverse effects of irradiation, radiosurgery has attracted great attention for clinical applications in both adults and children. Radiosurgical applications offer great potential for improving the toxicity profile of radiation delivery by focused and precise targeting of well-defined tumors under stereotactic immobilization and image guidance. Herein, we provide a concise review of stereotactic irradiation for pediatric glial neoplasms in light of the literature.
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Affiliation(s)
- Omer Sager
- Department of Radiation Oncology, Gulhane Medical Faculty, University of Health Sciences, Ankara 06018, Turkey
| | - Ferrat Dincoglan
- Department of Radiation Oncology, Gulhane Medical Faculty, University of Health Sciences, Ankara 06018, Turkey
| | - Selcuk Demiral
- Department of Radiation Oncology, Gulhane Medical Faculty, University of Health Sciences, Ankara 06018, Turkey
| | - Bora Uysal
- Department of Radiation Oncology, Gulhane Medical Faculty, University of Health Sciences, Ankara 06018, Turkey
| | - Hakan Gamsiz
- Department of Radiation Oncology, Gulhane Medical Faculty, University of Health Sciences, Ankara 06018, Turkey
| | - Onurhan Colak
- Department of Radiation Oncology, Gulhane Medical Faculty, University of Health Sciences, Ankara 06018, Turkey
| | - Fatih Ozcan
- Department of Radiation Oncology, Gulhane Medical Faculty, University of Health Sciences, Ankara 06018, Turkey
| | - Esin Gundem
- Department of Radiation Oncology, Gulhane Medical Faculty, University of Health Sciences, Ankara 06018, Turkey
| | - Yelda Elcim
- Department of Radiation Oncology, Gulhane Medical Faculty, University of Health Sciences, Ankara 06018, Turkey
| | - Bahar Dirican
- Department of Radiation Oncology, Gulhane Medical Faculty, University of Health Sciences, Ankara 06018, Turkey
| | - Murat Beyzadeoglu
- Department of Radiation Oncology, Gulhane Medical Faculty, University of Health Sciences, Ankara 06018, Turkey
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9
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Prasad D, Vern-Gross T, Wolden S. Radiosurgery, reirradiation, and brachytherapy. Pediatr Blood Cancer 2021; 68 Suppl 2:e28531. [PMID: 33818888 DOI: 10.1002/pbc.28531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 06/07/2020] [Accepted: 06/08/2020] [Indexed: 11/05/2022]
Abstract
Radiosurgery and brachytherapy are potentially useful treatment techniques that are sparingly applied in pediatric oncology. They are often used in the setting of reirradiation for recurrent or metastatic tumors. Reirradiation in children with recurrent tumors is complicated by the tolerance of critical organs and the potential risks for overall long-term dose-dependent complications. We review the current literature available in support of reirradiation and the use of radiosurgery and brachytherapy in pediatric patients.
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Affiliation(s)
- Dheerendra Prasad
- Department of Radiation Oncology and Neurosurgery, Roswell Park Comprehensive Cancer Center and Jacobs School of Medicine and Biomedical Sciences, Buffalo, New York
| | | | - Suzanne Wolden
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, New York
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10
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Murphy ES, Parsai S, Kano H, Sheehan JP, Martinez-Alvarez R, Martinez-Moreno N, Kondziolka D, Simonova G, Liscak R, Mathieu D, Lee CC, Yang HC, Lee JY, McShane BJ, Fang F, Trifiletti DM, Sharma M, Barnett GH. Outcomes of stereotactic radiosurgery for pilocytic astrocytoma: an international multiinstitutional study. J Neurosurg 2019; 134:162-170. [PMID: 31783364 DOI: 10.3171/2019.9.jns191335] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 09/13/2019] [Indexed: 02/05/2023]
Abstract
OBJECTIVE The current standard initial therapy for pilocytic astrocytoma is maximal safe resection. Radiation therapy is considered for residual, recurrent, or unresectable pilocytic astrocytomas. However, the optimal radiation strategy has not yet been established. Here, the authors describe the outcomes of stereotactic radiosurgery (SRS) for pilocytic astrocytoma in a large multiinstitutional cohort. METHODS An institutional review board-approved multiinstitutional database of patients treated with Gamma Knife radiosurgery (GKRS) between 1990 and 2016 was queried. Data were gathered from 9 participating International Radiosurgery Research Foundation (IRRF) centers. Patients with a histological diagnosis of pilocytic astrocytoma treated using a single session of GKRS and with at least 6 months of follow-up were included in the analysis. RESULTS A total of 141 patients were analyzed in the study. The median patient age was 14 years (range 2-84 years) at the time of GKRS. The median follow-up was 67.3 months. Thirty-nine percent of patients underwent SRS as the initial therapy, whereas 61% underwent SRS as salvage treatment. The median tumor volume was 3.45 cm3. The tumor location was the brainstem in 30% of cases, with a nonbrainstem location in the remainder. Five- and 10-year overall survival rates at the last follow-up were 95.7% and 92.5%, respectively. Five- and 10-year progression-free survival (PFS) rates were 74.0% and 69.7%, respectively. On univariate analysis, an age < 18 years, tumor volumes < 4.5 cm3, and no prior radiotherapy or chemotherapy were identified as positive prognostic factors for improved PFS. On multivariate analysis, only prior radiotherapy was significant for worse PFS. CONCLUSIONS This represents the largest study of single-session GKRS for pilocytic astrocytoma to date. Favorable long-term PFS and overall survival were observed with GKRS. Further prospective studies should be performed to evaluate appropriate radiosurgery dosing, timing, and sequencing of treatment along with their impact on toxicity and the quality of life of patients with pilocytic astrocytoma.
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Affiliation(s)
- Erin S Murphy
- 1Department of Radiation Oncology, Cleveland Clinic, Cleveland, Ohio
- 13Rose-Ella Burkhardt Brain Tumor and Neuro-Oncology Center, Cleveland, Ohio
| | - Shireen Parsai
- 1Department of Radiation Oncology, Cleveland Clinic, Cleveland, Ohio
| | - Hideyuki Kano
- 2Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Jason P Sheehan
- 3Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | - Roberto Martinez-Alvarez
- 4Department of Functional Neurosurgery and Radiosurgery, Ruber International Hospital, Madrid, Spain
| | - Nuria Martinez-Moreno
- 4Department of Functional Neurosurgery and Radiosurgery, Ruber International Hospital, Madrid, Spain
| | - Douglas Kondziolka
- 5Department of Neurosurgery, New York University Langone Medical Center, New York, New York
| | - Gabriela Simonova
- 6Department of Stereotactic and Radiation Neurosurgery, Na Homolce Hospital, Prague, Czech Republic
| | - Roman Liscak
- 6Department of Stereotactic and Radiation Neurosurgery, Na Homolce Hospital, Prague, Czech Republic
| | - David Mathieu
- 7Division of Neurosurgery, Université de Sherbrooke, Centre de Recherche du CHUS, Sherbrooke, Québec, Canada
| | - Cheng-Chia Lee
- 8Department of Neurosurgery, Neurologic Institute, Taipei Veterans General Hospital, Taipei, Taiwan, Republic of China
| | - Huai-Che Yang
- 8Department of Neurosurgery, Neurologic Institute, Taipei Veterans General Hospital, Taipei, Taiwan, Republic of China
| | - John Y Lee
- 9Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Brendan J McShane
- 9Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Fang Fang
- 10Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | | | - Mayur Sharma
- 12Department of Neurosurgery, University of Louisville, Kentucky; and
| | - Gene H Barnett
- 13Rose-Ella Burkhardt Brain Tumor and Neuro-Oncology Center, Cleveland, Ohio
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11
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Kida Y, Mori Y. Stereotactic Radiotherapy with Fractionation for the Lesions in and Around the Brainstem and Optic Nerve. Cureus 2019; 11:e6087. [PMID: 31723481 PMCID: PMC6837262 DOI: 10.7759/cureus.6087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Purpose Among the components of the central nervous system, the optic nerve and the brainstem are considered to be the eloquent structures that are sensitive to stereotactic radiosurgery (SRS) and stereotactic radiotherapy (SRT). SRS or SRT with fractionation in areas adjacent to these tissues is both promising and challenging. Materials and methods To clarify the precise dose distribution achievable with fractionation in and around the optic nerve and brainstem, theoretical simulations were performed, based on the biological effective dose (BED). Results These simulations clearly showed that the doses to the optic nerve and brainstem can be adjusted using fractionation, meaning that the prescribed doses to the surrounding brain tissue can be reduced. Conversely doses to the lesions themselves can be increased by fractionation, while maintaining a stable dose to normal optic nerve and brainstem tissue.
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Affiliation(s)
| | - Yoshimasa Mori
- Radiation Oncology and Neurosurgery, Center for Advanced Image-guided Radiation Therapy, Shin-Yurigaoka General Hospital, Kawasaki, JPN
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12
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Radiotherapy Advances in Pediatric Neuro-Oncology. Bioengineering (Basel) 2018; 5:bioengineering5040097. [PMID: 30400370 PMCID: PMC6315761 DOI: 10.3390/bioengineering5040097] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 10/26/2018] [Accepted: 11/01/2018] [Indexed: 12/31/2022] Open
Abstract
Radiation therapy (RT) represents an integral component in the treatment of many pediatric brain tumors. Multiple advances have emerged within pediatric radiation oncology that aim to optimize the therapeutic ratio—improving disease control while limiting RT-related toxicity. These include innovations in treatment planning with magnetic resonance imaging (MRI) simulation, as well as increasingly sophisticated radiation delivery techniques. Advanced RT techniques, including photon-based RT such as intensity-modulated RT (IMRT) and volumetric-modulated arc therapy (VMAT), as well as particle beam therapy and stereotactic RT, have afforded an array of options to dramatically reduce radiation exposure of uninvolved normal tissues while treating target volumes. Along with advances in image guidance of radiation treatments, novel RT approaches are being implemented in ongoing and future prospective clinical trials. As the era of molecular risk stratification unfolds, personalization of radiation dose, target, and technique holds the promise to meaningfully improve outcomes for pediatric neuro-oncology patients.
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13
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El-Shehaby AMN, Reda WA, Abdel Karim KM, Emad Eldin RM, Nabeel AM. Single-session Gamma Knife radiosurgery for optic pathway/hypothalamic gliomas. J Neurosurg 2018; 125:50-57. [PMID: 27903182 DOI: 10.3171/2016.8.gks161432] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Because of their critical and central location, it is deemed necessary to fractionate when considering irradiating optic pathway/hypothalamic gliomas. Stereotactic fractionated radiotherapy is considered safer when dealing with gliomas in this location. In this study, the safety and efficacy of single-session stereotactic radiosurgery for optic pathway/hypothalamic gliomas were reviewed. METHODS Between December 2004 and June 2014, 22 patients with optic pathway/hypothalamic gliomas were treated by single-session Gamma Knife radiosurgery. Twenty patients were available for follow-up for a minimum of 1 year after treatment. The patients were 5 to 43 years (median 16 years) of age. The tumor volume was 0.15 to 18.2 cm3 (median 3.1 cm3). The prescription dose ranged from 8 to 14 Gy (median 11.5 Gy). RESULTS The mean follow-up period was 43 months. Five tumors involved the optic nerve only, and 15 tumors involved the chiasm/hypothalamus. Two patients died during the follow-up period. The tumors shrank in 12 cases, remained stable in 6 cases, and progressed in 2 cases, thereby making the tumor control rate 90%. Vision remained stable in 12 cases, improved in 6 cases, and worsened in 2 cases in which there was tumor progression. Progression-free survival was 83% at 3 years. CONCLUSIONS The initial results indicate that single-session Gamma Knife radiosurgery is a safe and effective treatment option for optic pathway/hypothalamic gliomas.
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Affiliation(s)
| | - Wael A Reda
- Gamma Knife Center Cairo.,Neurosurgery Department and
| | - Khaled M Abdel Karim
- Gamma Knife Center Cairo.,Clinical Oncology Department, Faculty of Medicine, Ain Shams University
| | - Reem M Emad Eldin
- Gamma Knife Center Cairo.,Radiation Oncology Department, National Cancer Institute, Cairo University, Cairo; and
| | - Ahmed M Nabeel
- Gamma Knife Center Cairo.,Neurosurgery Department, Faculty of Medicine, Benha University, Qalubya, Egypt
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14
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Blionas A, Giakoumettis D, Klonou A, Neromyliotis E, Karydakis P, Themistocleous MS. Paediatric gliomas: diagnosis, molecular biology and management. ANNALS OF TRANSLATIONAL MEDICINE 2018; 6:251. [PMID: 30069453 PMCID: PMC6046297 DOI: 10.21037/atm.2018.05.11] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 05/02/2018] [Indexed: 01/14/2023]
Abstract
Paediatric gliomas represent the most common brain tumour in children. Early diagnosis and treatment greatly improve survival. Histological grade is the most significant classification system affecting treatment planning and prognosis. Paediatric gliomas depend on pathways and genes responsible for mitotic activity and cell proliferation as well as angiogenesis (MAPK, VEGF, EFGR pathways). Symptoms such as focal neurologic deficit or seizures can facilitate diagnosis, but they are not always present and therefore diagnosis is occasionally delayed. Imaging has adequate diagnostic accuracy (surpassing 90%), and novel imaging techniques such as MR spectroscopy and PET increase only slightly this percentage. Low grade gliomas (LGG) can be approached conservatively but most authors suggest surgical excision. High grade gliomas (HGG) are always operated with exception of specific contradictions including butterfly or extensive dominant hemisphere gliomas. Surgical excision is universally followed by radiotherapy and chemotherapy, which slightly increase survival. Inoperable cases can be managed with or without radiosurgery depending on location and size, with adjunctive use of radiotherapy and chemotherapy. Surgical excision must be aggressive and gross total resection (GTR) should be attempted, if possible, since it can triple survival. Radiosurgery is effective on smaller tumours of <2 cm2. Surgical excision is always the treatment of choice, but glioma recurrences, and residual tumours in non-critical locations are candidates for radiosurgery especially if tumour volume is low. Management of recurrences includes surgery, radiosurgery and chemoradiotherapy and it should be individualized according to location and size. In combination with molecular targeted therapeutic schemes, glioma management will be immensely improved in the next years.
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Affiliation(s)
- Alexandros Blionas
- Department of Neurosurgery, G. Gennimatas General Hospital, Athens, Greece
| | - Dimitrios Giakoumettis
- Department of Neurosurgery, University of Athens Medical School, “Evangelismos” General Hospital, Athens, Greece
| | - Alexia Klonou
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Athens, Greece
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15
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Hessissen L, Parkes J, Amayiri N, Mushtaq N, Sirachainan N, Anacak Y, Mitra D, Figaji A, Schouten-van Meeteren A, Sullivan M, Burger H, Davidson A, Bouffet E, Bailey S. SIOP PODC Adapted treatment guidelines for low grade gliomas in low and middle income settings. Pediatr Blood Cancer 2017; 64 Suppl 5. [PMID: 29297618 DOI: 10.1002/pbc.26737] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 06/22/2017] [Indexed: 12/15/2022]
Abstract
Effective treatment of children with low grade glioma (LGG) requires a functioning multi-disciplinary team with adequate neurosurgical, neuroradiological, pathological, radiotherapy and chemotherapy facilities and personnel. In addition, the treating centre should have the capacity to manage a variety of LGG and treatment-associated complications. These requirements have made it difficult for many centers in low and middle-income countries (LMIC) to offer effective treatment and follow up. This article provides management recommendations for children with LGG according to the level of facilities available.
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Affiliation(s)
- Laila Hessissen
- Department of Hematology and Pediatric Oncology, Hospital University Ibn Sina, Rabat, Morocco
| | - Jeannette Parkes
- Department of Radiation Oncology, Groote Schuur Hospital and University of Cape Town, Cape Town, South Africa
| | - Nisreen Amayiri
- Department of Hematology and Oncology, King Hussein Cancer Centre, Amman, Jordan
| | - Naureen Mushtaq
- Department of Pediatric Haematology and Oncology, Aga Khan University Hopsital, Karachi, Pakistan
| | - Nongnuch Sirachainan
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Yavuz Anacak
- Department of Radiation Oncology, Ege University School of Medicine & Hospital, Izmir, Turkey
| | - Dipayan Mitra
- Department of Radiology, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
| | - Anthony Figaji
- Department of Neurosurgery, Red Cross War Memorial Children's Hospital and University of Cape Town, Cape Town, South Africa
| | | | - Michael Sullivan
- Department of Paediatric Haematology and Oncology, Royal Hospital for Sick Children, Melbourne, Victoria, Australia
| | - Hester Burger
- Department Medical Physics, Groote Schuur Hospital and University of Cape Town, Cape Town, South Africa
| | - Alan Davidson
- Haematology Oncology Service, Red Cross War Memorial Children's Hospital, Department of Paediatrics and Child Health, University of Cape Town, South Africa
| | - Eric Bouffet
- Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Simon Bailey
- Great North Children's Hospital, Newcastle upon Tyne, United Kingdom
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16
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Gagliardi F, Bailo M, Spina A, Donofrio CA, Boari N, Franzin A, Fava A, Del Vecchio A, Bolognesi A, Mortini P. Gamma Knife Radiosurgery for Low-Grade Gliomas: Clinical Results at Long-Term Follow-Up of Tumor Control and Patients' Quality of Life. World Neurosurg 2017; 101:540-553. [PMID: 28216397 DOI: 10.1016/j.wneu.2017.02.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 02/06/2017] [Accepted: 02/07/2017] [Indexed: 01/18/2023]
Abstract
OBJECTIVE First-line therapy for low-grade gliomas (LGGs) is surgery, in some cases followed by radiotherapy and chemotherapy. Gamma Knife radiosurgery (GKRS) has gained more relevance in the management of these tumors. The aim of this study was to assess efficacy and safety of GKRS for treatment of LGGs. METHODS Between 2001 and 2014, 42 treatments were performed on 39 patients harboring LGGs; 48% of patients underwent previous surgery, and 20.5% underwent previous radiotherapy. Mean tumor volume was 2.7 cm3, and median margin dose was 15 Gy. RESULTS Mean follow-up was 60.5 months (range, 6-164 months). Actuarial progression-free survival was 74.9%, 52.8%, and 39.1% at 1 year, 5 years, and 10 years; actuarial overall survival was 97.4%, 94.6%, and 91.8% at 9 months, 1 year, and 5 years. Solid tumor control was achieved in 69.2% of patients, whereas cystic enlargement was recorded in 12.9% of cases. At last follow-up, volume reduction was recorded in 57.7% of cases, and median volume decreased by 33.3%. Clinical improvement was observed in 52.4% of patients. Karnofsky performance scale score was improved in 15 patients (45.5%), unchanged in 17 patients (51.5%), and worsened in 1 patient (3%). Mean posttreatment scores of 36-item short form health survey domains did not significantly differ from scores in a healthy Italian population. CONCLUSIONS This study confirms safety and effectiveness of GKRS for LGGs in controlling tumor growth, relevantly improving patients' overall and progression-free survival. GKRS improved patients' functional performance and quality of life, optimizing social functioning and minimizing disease-related psychological impact.
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Affiliation(s)
- Filippo Gagliardi
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy.
| | - Michele Bailo
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Alfio Spina
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Carmine A Donofrio
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Nicola Boari
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Alberto Franzin
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Arianna Fava
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Antonella Del Vecchio
- Service of Medical Physics, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Angelo Bolognesi
- Service of Radiation Oncology, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Pietro Mortini
- Department of Neurosurgery and Gamma Knife Radiosurgery, San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
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17
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Murphy ES, Chao ST, Angelov L, Vogelbaum MA, Barnett G, Jung E, Recinos VR, Mohammadi A, Suh JH. Radiosurgery for Pediatric Brain Tumors. Pediatr Blood Cancer 2016; 63:398-405. [PMID: 26536284 DOI: 10.1002/pbc.25831] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 10/13/2015] [Indexed: 11/05/2022]
Abstract
The utility of radiosurgery for pediatric brain tumors is not well known. For children, radiosurgery may have an important role for treating unresectable tumors, residual disease, or tumors in the recurrent setting that have received prior radiotherapy. The available evidence demonstrates utility for some children with primary brain tumors resulting in good local control. Radiosurgery can be considered for limited residual disease or focal recurrences. However, the potential toxicities are unique and not insignificant. Therefore, prospective studies need to be performed to develop guidelines for indications and treatment for children and reduce toxicity in this population.
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Affiliation(s)
- Erin S Murphy
- Department of Radiation Oncology, Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio.,Burkhardt Brain Tumor and Neuro-Oncology Center, Neurological Institute, Cleveland Clinic, Cleveland, Ohio
| | - Samuel T Chao
- Department of Radiation Oncology, Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio.,Burkhardt Brain Tumor and Neuro-Oncology Center, Neurological Institute, Cleveland Clinic, Cleveland, Ohio
| | - Lilyana Angelov
- Burkhardt Brain Tumor and Neuro-Oncology Center, Neurological Institute, Cleveland Clinic, Cleveland, Ohio
| | - Michael A Vogelbaum
- Burkhardt Brain Tumor and Neuro-Oncology Center, Neurological Institute, Cleveland Clinic, Cleveland, Ohio
| | - Gene Barnett
- Burkhardt Brain Tumor and Neuro-Oncology Center, Neurological Institute, Cleveland Clinic, Cleveland, Ohio
| | - Edward Jung
- Department of Radiation Oncology, John R. Marsh Cancer Center, Hagerstown, MD, USA
| | - Violette R Recinos
- Burkhardt Brain Tumor and Neuro-Oncology Center, Neurological Institute, Cleveland Clinic, Cleveland, Ohio
| | - Alireza Mohammadi
- Burkhardt Brain Tumor and Neuro-Oncology Center, Neurological Institute, Cleveland Clinic, Cleveland, Ohio
| | - John H Suh
- Department of Radiation Oncology, Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio.,Burkhardt Brain Tumor and Neuro-Oncology Center, Neurological Institute, Cleveland Clinic, Cleveland, Ohio
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18
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Tuleasca C, Negretti L, Magaddino V, Maeder P, Lhermitte B, Borruat FX, Levivier M. Biphasic response of a tecto-mesencephalic pilocytic astrocytoma after Gamma Knife surgery--A case report. Neurochirurgie 2015; 61:275-8. [PMID: 26072229 DOI: 10.1016/j.neuchi.2014.11.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 11/18/2014] [Accepted: 11/29/2014] [Indexed: 11/20/2022]
Abstract
Biphasic response (shrinkage-regrowth-shrinkage) of tumors has never previously been reported in the postoperative course, neither after microsurgery, nor after Gamma Knife surgery (GKS). We present the case of an adult with dorsal midbrain syndrome resulting from a pilocytic astrocytoma centered on the mesencephalic tectum. The tumor extended to the third ventricle and the thalamus. Initially, due to tumor growth, a biopsy was performed and histology established. Later, a ventriculocisternostomy for obstructive hydrocephalus was performed. Finally, GKS was performed, as the tumor continued to grow. After GKS, the lesion exhibited a biphasic response, with a major shrinkage at 3 months, regrowth within the target volume at 6 and 9 months and a second phase of important shrinkage at 12 months, which persisted for the next two years. The possible mechanisms for this particular response pattern are discussed.
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Affiliation(s)
- C Tuleasca
- Neurosurgery service, Gamma Knife center, CHU Vaudois, Lausanne, Switzerland; Medical image analysis laboratory (MIAL), CHU Vaudois, Lausanne, Switzerland; École politechnique fédérale de Lausanne, signal processing laboratory (LTS 5), Lausanne, Switzerland; Faculty of biology and medicine, university of Lausanne, Lausanne, Switzerland.
| | - L Negretti
- Radiation oncology service, CHU Vaudois, Lausanne, Switzerland; Radiation oncology department, Clinica Luganese, Lugano, Switzerland
| | - V Magaddino
- Institute of radiation physics, CHU Vaudois, Lausanne, Switzerland; Faculty of biology and medicine, university of Lausanne, Lausanne, Switzerland
| | - P Maeder
- Radiology department, CHU Vaudois, Lausanne, Switzerland; Faculty of biology and medicine, university of Lausanne, Lausanne, Switzerland
| | - B Lhermitte
- Neuropathology department, CHU Vaudois, Lausanne, Switzerland; Faculty of biology and medicine, university of Lausanne, Lausanne, Switzerland
| | - F-X Borruat
- Unité de neuro-ophtalmologie, service universitaire d'ophtalmologie, hôpital ophtalmique Jules-Gonin, Lausanne, Switzerland; Faculty of biology and medicine, university of Lausanne, Lausanne, Switzerland
| | - M Levivier
- Neurosurgery service, Gamma Knife center, CHU Vaudois, Lausanne, Switzerland; Faculty of biology and medicine, university of Lausanne, Lausanne, Switzerland
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19
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El-Shehaby AMN, Reda WAH, Abdel Karim KM, Emad Eldin RM, Esene IN. Gamma Knife radiosurgery for low-grade tectal gliomas. Acta Neurochir (Wien) 2015; 157:247-56. [PMID: 25510647 DOI: 10.1007/s00701-014-2299-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 12/01/2014] [Indexed: 11/25/2022]
Abstract
BACKGROUND Tectal gliomas are present in a critical location that makes their surgical treatment difficult. Stereotactic radiosurgery presents an attractive noninvasive treatment option. However, tectal gliomas are also commonly associated with aqueductal obstruction and consequently hydrocephalus. This necessitates some form of CSF diversion procedure before radiosurgery. The aim of the study was to assess the efficacy and safety of Gamma Knife radiosurgery for tectal gliomas. PATIENTS AND METHODS Between October 2002 and May 2011, 11 patients with tectal gliomas were treated with Gamma Knife radiosurgery. Five patients had pilocytic astrocytomas and six nonpilocytic astrocytomas. Ten patients presented with hydrocephalus and underwent a CSF diversion procedure [7 V-P shunt and 3 endoscopic third ventriculostomy (ETV)]. The tumor volume ranged between 1.2-14.7 cc (median 4.5 cc). The prescription dose was 11-14 Gy (median 12 Gy). RESULTS Patients were followed for a median of 40 months (13-114 months). Tumor control after radiosurgery was seen in all cases. In 6/11 cases, the tumors eventually disappeared after treatment. Peritumoral edema developed in 5/11 cases at an onset of 3-6 months after treatment. Transient tumor swelling was observed in four cases. Four patients developed cysts after treatment. One of these cases required aspiration and eventually disappeared, one became smaller spontaneously, and two remained stable. CONCLUSION Gamma Knife radiosurgery is an effective and safe technique for treatment of tectal gliomas. Tumor shrinkage or disappearance after Gamma Knife radiosurgery may preclude the need for a shunt later on.
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