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Yilmaz MT, Kahvecioglu A, Yazici G, Mohammadipour S, Kertmen N, Cifci GC, Zorlu F. Hypofractionated stereotactic re-irradiation for progressive glioblastoma: twelve years' experience of a single center. J Neurooncol 2024; 167:295-303. [PMID: 38383875 PMCID: PMC11023988 DOI: 10.1007/s11060-024-04607-4] [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: 01/22/2024] [Accepted: 02/14/2024] [Indexed: 02/23/2024]
Abstract
PURPOSE We aimed to evaluate the prognostic factors and the role of stereotactic radiotherapy (SRT) as a re-irradiation technique in the management of progressive glioblastoma. METHODS The records of 77 previously irradiated glioblastoma patients who progressed and received second course hypofractionated SRT (1-5 fractions) between 2009 and 2022 in our department were evaluated retrospectively. Statistical Package for the Social Sciences (SPSS) version 23.0 (IBM, Armonk, NY, USA) was utilized for all statistical analyses. RESULTS The median time to progression from the end of initial radiotherapy was 14 months (range, 6-68 months). The most common SRT schedule was 30 Gy (range, 18-50 Gy) in 5 fractions (range, 1-5 fractions). The median follow-up after SRT was 9 months (range, 3-80 months). One-year overall (OS) and progression-free survival (PFS) rates after SRT were 46% and 35%, respectively. Re-irradiation dose and the presence of pseudoprogression were both significant independent positive prognostic factors for both OS (p = 0.009 and p = 0.04, respectively) and PFS (p = 0.008 and p = 0.04, respectively). For PFS, progression-free interval > 14 months was also a prognostic factor (p = 0.04). The treatment was well tolerated without significant acute toxicity. During follow-up, radiation necrosis was observed in 17 patients (22%), and 14 (82%) of them were asymptomatic. CONCLUSION Hypofractionated SRT is an effective treatment approach for patients with progressive glioblastoma. Younger patients who progressed later than 14 months, received higher SRT doses, and experienced pseudoprogression following SRT had improved survival rates.
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Affiliation(s)
- Melek Tugce Yilmaz
- Department of Radiation Oncology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Alper Kahvecioglu
- Department of Radiation Oncology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Gozde Yazici
- Department of Radiation Oncology, Hacettepe University Faculty of Medicine, Ankara, Turkey.
| | - Sepideh Mohammadipour
- Department of Radiation Oncology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Neyran Kertmen
- Department of Medical Oncology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Gokcen Coban Cifci
- Radiology Department, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Faruk Zorlu
- Department of Radiation Oncology, Hacettepe University Faculty of Medicine, Ankara, Turkey
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Shields LB, O'Dell P, Daniels MW, Sevak PR, Highfield HA, Sinicrope KD, Sun DA, Spalding AC. Impact of Reirradiation Utilizing Fractionated Stereotactic Radiotherapy for Recurrent Glioblastoma. Cureus 2024; 16:e53001. [PMID: 38406061 PMCID: PMC10894660 DOI: 10.7759/cureus.53001] [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] [Accepted: 01/23/2024] [Indexed: 02/27/2024] Open
Abstract
BACKGROUND Patients with recurrent glioblastoma (GBM) have limited treatment options. This study determined whether patients with recurrent GBM treated with initial radiation/temozolomide (TMZ) and reirradiation using fractionated stereotactic radiotherapy (FSRT) had improved outcomes. MATERIALS AND METHODS We identified 95 patients with recurrent GBM, 50 of whom underwent FSRT at recurrence and 45 who had systemic treatment only (control). The median total FSRT dose at the time of GBM recurrence was 30 Gy in five fractions of the gadolinium-enhanced tumor only. RESULTS With a median follow-up of 18 months, the progression-free survival (PFS) and overall survival (OS) following initial GBM diagnosis were longer in the reirradiation group compared to the control group (13.5 vs. 7.5 months [p=0.001] and 24.6 vs. 12.6 months [p<0.001], respectively). For patients who underwent reirradiation, the median time interval between the end of the initial radiation and reirradiation was 15.2 months. The median OS after GBM recurrence was longer in the reirradiation group versus the control group (9.9 vs. 3.5 months [p<0.001]), with a one-year OS survival rate of 22%. The hazard ratio for death of patients in the reirradiation group was 0.31 [0.19-0.50]. The reirradiation group had a higher percentage of patients who received bevacizumab (BEV, 62.0% vs. 28.9%, p=0.002) and a lower percentage of patients whose TMZ was discontinued due to toxicity (8.0% vs. 28.9%, p=0.017) compared to the control group. CONCLUSIONS Reirradiation utilizing FSRT was associated with improved PFS and OS after GBM recurrence compared to the control group who did not receive additional irradiation.
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Affiliation(s)
- Lisa B Shields
- Norton Neuroscience Institute, Norton Healthcare, Louisville, USA
| | - Patrick O'Dell
- Norton Cancer Institute, Norton Healthcare, Louisville, USA
| | - Michael W Daniels
- Bioinformatics and Biostatistics, University of Louisville, Louisville, USA
| | - Parag R Sevak
- Norton Cancer Institute, Norton Healthcare, Louisville, USA
| | - Hilary A Highfield
- Clinical Pathology Accreditation (CPA) Laboratory, Norton Healthcare, Louisville, USA
| | | | - David A Sun
- Norton Neuroscience Institute, Norton Healthcare, Louisville, USA
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Marwah R, Xing D, Squire T, Soon YY, Gan HK, Ng SP. Reirradiation versus systemic therapy versus combination therapy for recurrent high-grade glioma: a systematic review and meta-analysis of survival and toxicity. J Neurooncol 2023; 164:505-524. [PMID: 37733174 PMCID: PMC10589175 DOI: 10.1007/s11060-023-04441-0] [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: 07/30/2023] [Accepted: 08/28/2023] [Indexed: 09/22/2023]
Abstract
PURPOSE This review compares reirradiation (reRT), systemic therapy and combination therapy (reRT & systemic therapy) with regards to overall survival (OS), progression-free survival (PFS), adverse effects (AEs) and quality of life (QoL) in patients with recurrent high-grade glioma (rHGG). METHODS A search was performed on PubMed, Scopus, Embase and CENTRAL. Studies reporting OS, PFS, AEs and/or QoL and encompassing the following groups were included; reirradiation vs systemic therapy, combination therapy vs systemic therapy, combination therapy vs reRT, and bevacizumab-based combination therapy vs reRT with/without non-bevacizumab-based systemic therapy. Meta-analyses were performed utilising a random effects model. Certainty of evidence was assessed using GRADE. RESULTS Thirty-one studies (three randomised, twenty-eight non-randomised) comprising 2084 participants were included. In the combination therapy vs systemic therapy group, combination therapy improved PFS (HR 0.57 (95% CI 0.41-0.79); low certainty) and OS (HR 0.73 (95% CI 0.56-0.95); low certainty) and there was no difference in grade 3 + AEs (RR 1.03 (95% CI 0.57-1.86); very low certainty). In the combination therapy vs reRT group, combination therapy improved PFS (HR 0.52 (95% CI 0.38-0.72); low certainty) and OS (HR 0.69 (95% CI 0.52-0.93); low certainty). In the bevacizumab-based combination therapy vs reRT with/without non-bevacizumab-based systemic therapy group, adding bevacizumab improved PFS (HR 0.46 (95% CI 0.27-0.77); low certainty) and OS (HR 0.42 (95% CI 0.24-0.72; low certainty) and reduced radionecrosis (RR 0.17 (95% CI 0.06-0.48); low certainty). CONCLUSIONS Combination therapy may improve OS and PFS with acceptable toxicities in patients with rHGG compared to reRT or systemic therapy alone. Particularly, combining bevacizumab with reRT prophylactically reduces radionecrosis. REGISTRATION CRD42022291741.
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Affiliation(s)
- Ravi Marwah
- Department of Radiation Oncology, Townsville University Hospital, 100 Angus Smith Drive, Douglas, Townsville, QLD, 4814, Australia.
- College of Medicine and Dentistry, James Cook University, Townsville, Australia.
| | - Daniel Xing
- Department of Radiation Oncology, Townsville University Hospital, 100 Angus Smith Drive, Douglas, Townsville, QLD, 4814, Australia
- College of Medicine and Dentistry, James Cook University, Townsville, Australia
| | - Timothy Squire
- Department of Radiation Oncology, Townsville University Hospital, 100 Angus Smith Drive, Douglas, Townsville, QLD, 4814, Australia
- College of Medicine and Dentistry, James Cook University, Townsville, Australia
| | - Yu Yang Soon
- Department of Radiation Oncology, National University Cancer Institute, Singapore, Singapore
| | - Hui K Gan
- Department of Medical Oncology, Olivia Newton-John Cancer Wellness & Research Centre, Austin Health, Melbourne, Australia
- Cancer Therapies and Biology Group, Centre of Research Excellence in Brain Tumours, Olivia Newton-John Cancer Wellness & Research Centre, Austin Hospital, Melbourne, Australia
| | - Sweet Ping Ng
- Department of Radiation Oncology, Olivia Newton-John Cancer Wellness & Research Centre, Austin Health, Melbourne, Australia
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Park DJ, Persad AR, Yoo KH, Marianayagam NJ, Yener U, Tayag A, Ustrzynski L, Emrich SC, Chuang C, Pollom E, Soltys SG, Meola A, Chang SD. Stereotactic Radiosurgery for Contrast-Enhancing Satellite Nodules in Recurrent Glioblastoma: A Rare Case Series From a Single Institution. Cureus 2023; 15:e44455. [PMID: 37664337 PMCID: PMC10470661 DOI: 10.7759/cureus.44455] [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: 08/02/2023] [Accepted: 08/30/2023] [Indexed: 09/05/2023] Open
Abstract
Introduction Glioblastoma (GBM) is the most common malignant adult brain tumor and is invariably fatal. The standard treatment for GBM involves resection where possible, followed by chemoradiation per Stupp's protocol. We frequently use stereotactic radiosurgery (SRS) as a single-fraction treatment for small (volume ≤ 1cc) nodular recurrent GBM to the contrast-enhancing target on T1 MRI scan. In this paper, we aimed to evaluate the safety and efficacy of SRS for patients with contrast-enhancing satellite nodules in recurrent GBM. Methods This retrospective study analyzed the clinical and radiological outcomes of five patients who underwent CyberKnife (Accuray Inc., Sunnyvale, California) SRS at the institute between 2013 and 2022. Results From 96 patients receiving SRS for GBM, five (four males, one female; median age 53) had nine distinct new satellite lesions on MRI, separate from their primary tumor beds. Those nine lesions were treated with a median margin dose of 20 Gy in a single fraction. The three-, six, and 12-month local tumor control rates were 77.8%, 66.7%, and 26.7%, respectively. Median progression-free survival (PFS) was seven months, median overall survival following SRS was 10 months, and median overall survival (OS) was 35 months. Interestingly, the only lesion that did not show radiological progression was separate from the T2-fluid attenuated inversion recovery (FLAIR) signal of the main tumor. Conclusion Our SRS treatment outcomes for recurrent GBM satellite lesions are consistent with existing findings. However, in a unique case, a satellite nodule distinct from the primary tumor's T2-FLAIR signal and treated with an enlarged target volume showed promising control until the patient's demise. This observation suggests potential research avenues, given the limited strategies for 'multicentric' GBM lesions.
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Affiliation(s)
- David J Park
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, USA
| | - Amit R Persad
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, USA
| | - Kelly H Yoo
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, USA
| | | | - Ulas Yener
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, USA
| | - Armine Tayag
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, USA
| | - Louisa Ustrzynski
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, USA
| | - Sara C Emrich
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, USA
| | - Cynthia Chuang
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, USA
| | - Erqi Pollom
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, USA
| | - Scott G Soltys
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, USA
| | - Antonio Meola
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, USA
| | - Steven D Chang
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, USA
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Mantica M, Drappatz J, Lieberman F, Hadjipanayis CG, Lunsford LD, Niranjan A. Phase II study of border zone stereotactic radiosurgery with bevacizumab in patients with recurrent or progressive glioblastoma multiforme. J Neurooncol 2023; 164:179-190. [PMID: 37515669 DOI: 10.1007/s11060-023-04398-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 07/14/2023] [Indexed: 07/31/2023]
Abstract
PURPOSE Recurrent glioblastoma is universally fatal with limited effective treatment options. The aim of this phase 2 study of Border Zone SRS plus bevacizumab was to evaluate OS in patients with recurrent GBM. METHODS Patients with histologically confirmed GBM with recurrent disease who had received prior first-line treatment with fractionated radiotherapy and chemotherapy and eligible for SRS were enrolled. Bevacizumab 10 mg/kg was given day -1, day 14, and then every 14 days until disease progression. 1-14 days before BZ-SRS procedure, patients underwent brain MRI /MRS. MRS with measurement of choline-to-N-acetyl aspartate index (CNI) area ≥ 3 was targeted for SRS. RESULTS From 2015-2017, sixteen of planned 40 patients were enrolled. The median age was 62 (range, 48-74Y). 3/16 (0.188) participants experienced grade 2 toxicity. No AREs were reported. The mOS was 11.73 months compared to 8.74 months (P = 0.324) from date of SRS for the BZ-SRS and institutional historical controls, respectively. PFS-6 and OS-6 were 31.2% (p = 0.00294) and 81.2%(p = 0.058), respectively. Of 13 evaluable for best response: 1 CR (p = 0.077), 4 PR (p = 0.308), 7 SD (p = 0.538), and 1 PD (p = 0.077). 11/16 participants had MRS scans with an estimated probability that MRS changes a treatment plan of 0 (0, 0.285). CONCLUSION BZ-SRS with bevacizumab was feasible and well tolerated. There is no significant survival benefit using BZ-SRS with bevacizumab compared to institutional historical controls. Secondary analysis revealed a trend toward improved PFS-6, but not OS-6 after BZ-SRS. MRS scans did not result in changes to SRS treatment plans.
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Affiliation(s)
- Megan Mantica
- University of Pittsburgh Medical Center, 5150 Centre Avenue, Pittsburgh, PA, 15232, USA.
| | - Jan Drappatz
- University of Pittsburgh Medical Center, 5150 Centre Avenue, Pittsburgh, PA, 15232, USA
| | - Frank Lieberman
- University of Pittsburgh Medical Center, 5150 Centre Avenue, Pittsburgh, PA, 15232, USA
| | | | - L Dade Lunsford
- University of Pittsburgh Medical Center, 200 Lothrop Street, Pittsburgh, PA, 15213, USA
| | - Ajay Niranjan
- University of Pittsburgh Medical Center, 200 Lothrop Street, Pittsburgh, PA, 15213, USA
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Fu M, Zhou Z, Huang X, Chen Z, Zhang L, Zhang J, Hua W, Mao Y. Use of Bevacizumab in recurrent glioblastoma: a scoping review and evidence map. BMC Cancer 2023; 23:544. [PMID: 37316802 DOI: 10.1186/s12885-023-11043-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 06/06/2023] [Indexed: 06/16/2023] Open
Abstract
BACKGROUND Glioblastoma (GBM) is the most malignant primary tumor in the brain, with poor prognosis and limited effective therapies. Although Bevacizumab (BEV) has shown promise in extending progression-free survival (PFS) treating GBM, there is no evidence for its ability to prolong overall survival (OS). Given the uncertainty surrounding BEV treatment strategies, we aimed to provide an evidence map associated with BEV therapy for recurrent GBM (rGBM). METHODS PubMed, Embase, and the Cochrane Library were searched for the period from January 1, 1970, to March 1, 2022, for studies reporting the prognoses of patients with rGBM receiving BEV. The primary endpoints were overall survival (OS) and quality of life (QoL). The secondary endpoints were PFS, steroid use reduction, and risk of adverse effects. A scoping review and an evidence map were conducted to explore the optimal BEV treatment (including combination regimen, dosage, and window of opportunity). RESULTS Patients with rGBM could gain benefits in PFS, palliative, and cognitive advantages from BEV treatment, although the OS benefits could not be verified with high-quality evidence. Furthermore, BEV combined therapy (especially with lomustine and radiotherapy) showed higher efficacy than BEV monotherapy in the survival of patients with rGBM. Specific molecular alterations (IDH mutation status) and clinical features (large tumor burden and double-positive sign) could predict better responses to BEV administration. A low dosage of BEV showed equal efficacy to the recommended dose, but the optimal opportunity window for BEV administration remains unclear. CONCLUSIONS Although OS benefits from BEV-containing regimens could not be verified in this scoping review, the PFS benefits and side effects control supported BEV application in rGBM. Combining BEV with novel treatments like tumor-treating field (TTF) and administration at first recurrence may optimize the therapeutic efficacy. rGBM with a low apparent diffusion coefficient (ADCL), large tumor burden, or IDH mutation is more likely to benefit from BEV treatment. High-quality studies are warranted to explore the combination modality and identify BEV-response subpopulations to maximize benefits.
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Affiliation(s)
- Minjie Fu
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, #12 Middle Urumqi Road, Shanghai, China
- National Center for Neurological Disorders, Shanghai, China
- Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Shanghai, China
- Neurosurgical Institute of Fudan University, Shanghai, China
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China
| | - Zhirui Zhou
- Radiation Oncology Center, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xiao Huang
- Department of General Surgery, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Zhenchao Chen
- Department of General Surgery, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Licheng Zhang
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, #12 Middle Urumqi Road, Shanghai, China
- National Center for Neurological Disorders, Shanghai, China
- Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Shanghai, China
- Neurosurgical Institute of Fudan University, Shanghai, China
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China
| | - Jinsen Zhang
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, #12 Middle Urumqi Road, Shanghai, China
- National Center for Neurological Disorders, Shanghai, China
- Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Shanghai, China
- Neurosurgical Institute of Fudan University, Shanghai, China
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China
| | - Wei Hua
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, #12 Middle Urumqi Road, Shanghai, China.
- National Center for Neurological Disorders, Shanghai, China.
- Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Shanghai, China.
- Neurosurgical Institute of Fudan University, Shanghai, China.
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China.
| | - Ying Mao
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, #12 Middle Urumqi Road, Shanghai, China.
- National Center for Neurological Disorders, Shanghai, China.
- Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Shanghai, China.
- Neurosurgical Institute of Fudan University, Shanghai, China.
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China.
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Grahm Valadie O, Brown SL, Farmer K, Nagaraja TN, Cabral G, Shadaia S, Divine GW, Knight RA, Lee IY, Dolan J, Rusu S, Joiner MC, Ewing JR. Characterization of the Response of 9L and U-251N Orthotopic Brain Tumors to 3D Conformal Radiation Therapy. Radiat Res 2023; 199:217-228. [PMID: 36656561 PMCID: PMC10174721 DOI: 10.1667/rade-22-00048.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 12/21/2022] [Indexed: 01/20/2023]
Abstract
In a study employing MRI-guided stereotactic radiotherapy (SRS) in two orthotopic rodent brain tumor models, the radiation dose yielding 50% survival (the TCD50) was sought. Syngeneic 9L cells, or human U-251N cells, were implanted stereotactically in 136 Fischer 344 rats or 98 RNU athymic rats, respectively. At approximately 7 days after implantation for 9L, and 18 days for U-251N, rats were imaged with contrast-enhanced MRI (CE-MRI) and then irradiated using a Small Animal Radiation Research Platform (SARRP) operating at 220 kV and 13 mA with an effective energy of ∼70 keV and dose rate of ∼2.5 Gy per min. Radiation doses were delivered as single fractions. Cone-beam CT images were acquired before irradiation, and tumor volumes were defined using co-registered CE-MRI images. Treatment planning using MuriPlan software defined four non-coplanar arcs with an identical isocenter, subsequently accomplished by the SARRP. Thus, the treatment workflow emulated that of current clinical practice. The study endpoint was animal survival to 200 days. The TCD50 inferred from Kaplan-Meier survival estimation was approximately 25 Gy for 9L tumors and below 20 Gy, but within the 95% confidence interval in U-251N tumors. Cox proportional-hazards modeling did not suggest an effect of sex, with the caveat of wide confidence intervals. Having identified the radiation dose at which approximately half of a group of animals was cured, the biological parameters that accompany radiation response can be examined.
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Affiliation(s)
- O. Grahm Valadie
- Department of Neurology, Henry Ford Hospital, Detroit, Michigan
- Department of Radiation Oncology, Henry Ford Hospital, Detroit, Michigan
- Department of Radiation Oncology, Wayne State University, Detroit, Michigan
| | - Stephen L. Brown
- Department of Radiation Oncology, Henry Ford Hospital, Detroit, Michigan
- Department of Radiation Oncology, Wayne State University, Detroit, Michigan
- Department of Radiology, Michigan State University College of Human Medicine, East Lansing, Michigan
| | - Katelynn Farmer
- Department of Neurology, Henry Ford Hospital, Detroit, Michigan
| | | | - Glauber Cabral
- Department of Neurology, Henry Ford Hospital, Detroit, Michigan
| | - Sheldon Shadaia
- Department of Neurology, Henry Ford Hospital, Detroit, Michigan
| | - George W. Divine
- Department of Public Health Sciences, Henry Ford Hospital, Detroit Michigan
| | - Robert A. Knight
- Department of Neurology, Henry Ford Hospital, Detroit, Michigan
- Department of Physics, Oakland University, Rochester, Michigan
| | - Ian Y. Lee
- Department of Neurosurgery, Henry Ford Hospital, Detroit Michigan
| | - Jennifer Dolan
- Department of Radiation Oncology, Henry Ford Hospital, Detroit, Michigan
| | - Sam Rusu
- Department of Neurology, Henry Ford Hospital, Detroit, Michigan
| | - Michael C. Joiner
- Department of Radiation Oncology, Wayne State University, Detroit, Michigan
| | - James R. Ewing
- Department of Neurology, Henry Ford Hospital, Detroit, Michigan
- Department of Radiology, Michigan State University College of Human Medicine, East Lansing, Michigan
- Department of Neurosurgery, Henry Ford Hospital, Detroit Michigan
- Department of Physics, Oakland University, Rochester, Michigan
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