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Hippocampus radiotherapy

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https://www.readbyqxmd.com/read/29891263/treatment-design-and-rationale-for-a-randomized-trial-of-prophylactic-cranial-irradiation-with-or-without-hippocampal-avoidance-for-sclc-premer-trial-on-behalf-of-the-oncologic-group-for-the-study-of-lung-cancer-spanish-radiation-oncology-group-radiation-oncology
#1
Nuria Rodríguez de Dios, Felipe Couñago, José Luis López, Patricia Calvo, Mauricio Murcia, Mikel Rico, Carmen Vallejo, Javier Luna, Itziar Trueba, Cristina Cigarral, Nuria Farre, Rosa Maria Manero, Xavier Durán, Pilar Samper
BACKGROUND: Prophylactic cranial irradiation (PCI) is part of the usual treatment in most patients with small-cell lung cancer (SCLC) and response after treatment of the primary tumor. Clinical evidence suggests that radiation dose received by the hippocampus during whole brain radiotherapy might play a role in radiation-induced neurocognitive decline. PATIENTS AND METHODS: This study is a multicenter phase III trial (NCT02397733) randomizing SCLC patients after informed consent, to receive standard PCI treatment or PCI with hippocampus avoidance (PCI-HA) by using intensity modulated radiation therapy or volumetric modulated arc therapy...
May 10, 2018: Clinical Lung Cancer
https://www.readbyqxmd.com/read/29849106/radiation-induced-overexpression-of-transthyretin-inhibits-retinol-mediated-hippocampal-neurogenesis
#2
JiHoon Kang, Wanyeon Kim, HyunJeong Seo, EunGi Kim, Beomseok Son, Sungmin Lee, Gaeul Park, Sunmi Jo, Changjong Moon, HyeSook Youn, BuHyun Youn
Cranial irradiation is the main therapeutic strategy for treating primary and metastatic brain tumors. However, radiation is well-known to induce several unexpected side effects including emotional disorders. Although radiation-induced depression may cause decreased quality of life after radiotherapy, investigations of its molecular mechanism and therapeutic strategies are still insufficient. In this study, we found that behavioral symptoms of depression on mice models with the decrease of BrdU/NeuN- and Dcx-positive populations and MAP-2 expression in hippocampus were induced by cranial irradiation, and transthyretin (TTR) was highly expressed in hippocampus after irradiation...
May 30, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29778320/simultaneously-avoiding-the-hippocampus-and-hypothalamic-pituitary-axis-during-whole-brain-radiotherapy-a-planning-study
#3
Xing-Wen Fan, Juan-Qi Wang, Jun-Lan Wu, Hong-Bing Wang, Kai-Liang Wu
Whole brain radiotherapy (WBRT) is the preferred treatment for multiple brain metastases, and patients with limited-stage small cell lung cancer undergo prophylactic cranial irradiation after complete remission. However, neurotoxicity remains a complication. In addition to protecting the hippocampus from irradiation to preserve cognitive function, it is also critical to avoid irradiating the hypothalamic-pituitary axis to preserve endocrine and immune function. This study aimed to evaluate the feasibility of delivering WBRT while protecting the hippocampus and hypothalamic-pituitary axis...
May 16, 2018: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29689442/ameliorating-mitochondrial-dysfunction-restores-carbon-ion-induced-cognitive-deficits-via-co-activation-of-nrf2-and-pink1-signaling-pathway
#4
Yang Liu, Jiawei Yan, Cao Sun, Guo Li, Sirui Li, Luwei Zhang, Cuixia Di, Lu Gan, Yupei Wang, Rong Zhou, Jing Si, Hong Zhang
Carbon ion therapy is a promising modality in radiotherapy to treat tumors, however, a potential risk of induction of late normal tissue damage should still be investigated and protected. The aim of the present study was to explore the long-term cognitive deficits provoked by a high-linear energy transfer (high-LET) carbon ions in mice by targeting to hippocampus which plays a crucial role in memory and learning. Our data showed that, one month after 4 Gy carbon ion exposure, carbon ion irradiation conspicuously resulted in the impaired cognitive performance, neurodegeneration and neuronal cell death, as well as the reduced mitochondrial integrity, the disrupted activities of tricarboxylic acid cycle flux and electron transport chain, and the depressed antioxidant defense system, consequently leading to a decline of ATP production and persistent oxidative damage in the hippocampus region...
April 14, 2018: Redox Biology
https://www.readbyqxmd.com/read/29618828/results-of-the-radiation-dose-of-head-body-and-tail-of-hippocampus-in-nasopharyngeal-carcinoma-patients-treated-with-intensity-modulated-radiotherapy
#5
Sun Zong-Wen, Shi Lei, Li Qinglin, Kong Yue, Du Feng-Lei, Xie Tie-Ming, Hua Yong-Hong, Hu Qiao-Ying, Chen Xiao-Zhong, Chen Yuan-Yuan, Chen Ming
This study is to analyze the radiation dose of head, body and tail of hippocampus (HC) of nasopharyngeal carcinoma (NPC) patients treated with intensity modulated radiotherapy (IMRT). Evaluate cognitive function of patients with Wechsler adult intelligence scale-Chinese revised (WAIS-CR). HC were segmented into HC head (HH), HC body (HB) and HC tail (HT) and the indexes were then analyzed. WAIS-CR was tested before and 3months after radiotherapy. The mean radiation dose of left and right HC was (1147 ± 976)cGy, (1011 ± 602)cGy respectively...
April 4, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29576492/hippocampal-sparing-in-stereotactic-radiotherapy-for-brain-metastases-to-contour-or-not-contour-the-hippocampus
#6
C Di Carlo, M Trignani, L Caravatta, A Vinciguerra, A Augurio, F Perrotti, M Di Tommaso, M Nuzzo, S Giancaterino, M D Falco, D Genovesi
PURPOSE: The aim of our study was to evaluate hippocampal irradiation in patients treated with fractionated stereotactic brain radiotherapy. PATIENTS AND METHODS: Retrospective hippocampal dosimetric analysis performed on 22 patients with one to four brain metastases treated with fractionated stereotactic radiotherapy using volumetric intensity-modulated arc therapy. Original plans did not include hippocampus as avoidance structure in optimization criteria; hippocampus was retrospectively delineated on magnetic resonance coregistered with planning CT and using as reference the RTOG 0933 atlas...
April 2018: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/29519628/4%C3%AF-plan-optimization-for-cortical-sparing-brain-radiotherapy
#7
Vyacheslav L Murzin, Kaley Woods, Vitali Moiseenko, Roshan Karunamuni, Kathryn R Tringale, Tyler M Seibert, Michael J Connor, Daniel R Simpson, Ke Sheng, Jona A Hattangadi-Gluth
BACKGROUND AND PURPOSE: Incidental irradiation of normal brain tissue during radiotherapy is linked to cognitive decline, and may be mediated by damage to healthy cortex. Non-coplanar techniques may be used for cortical sparing. We compared normal brain sparing and probability of cortical atrophy using 4π radiation therapy planning vs. standard fixed gantry intensity-modulated radiotherapy (IMRT). MATERIAL AND METHODS: Plans from previously irradiated brain tumor patients ("original IMRT", n = 13) were re-planned to spare cortex using both 4π optimization ("4π") and IMRT optimization ("optimized IMRT")...
April 2018: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29463267/hippocampus-sparing-radiotherapy-using-volumetric-modulated-arc-therapy-vmat-to-the-primary-brain-tumor-the-result-of-dosimetric-study-and-neurocognitive-function-assessment
#8
Kyung Su Kim, Chan Woo Wee, Jin-Yong Seok, Joo Wan Hong, Jin-Beom Chung, Keun-Yong Eom, Jae-Sung Kim, Chae-Yong Kim, Young Ho Park, Yu Jung Kim, In Ah Kim
BACKGROUND: We hypothesized that hippocampal-sparing radiotherapy via volumetric modulated arc therapy (VMAT) could preserve the neurocognitive function (NCF) of patients with primary brain tumors treated with radiotherapy. METHODS: We reviewed data from patients with primary brain tumors who underwent hippocampal-sparing brain radiotherapy via VMAT between February 2014 and December 2015. The optimization criteria for the contralateral hippocampus was a maximum dose (Dmax ) of less than 17 Gy...
February 20, 2018: Radiation Oncology
https://www.readbyqxmd.com/read/29424258/anti-leukemic-treatment-induced-neurotoxicity-in-long-term-survivors-of-childhood-acute-lymphoblastic-leukemia-impact-of-reduced-central-nervous-system-radiotherapy-and-intermediate-to-high-dose-methotrexate
#9
Olga Zając-Spychała, Mikolaj Pawlak, Katarzyna Karmelita-Katulska, Jakub Pilarczyk, Katarzyna Jończyk-Potoczna, Agnieszka Przepióra, Katarzyna Derwich, Jacek Wachowiak
The aim of the study was to evaluate the long-term neurodevelopmental consequences of currently applied acute lymphoblastic leukemia (ALL) therapy containing chemotherapy alone or combined with 12 Gy radiotherapy. Seventy-nine children aged 6.3-21.7 years diagnosed with ALL and treated according to ALL IC-BFM 2002 have been studied. The control group consisted of 23 children newly diagnosed with ALL. We assessed subcortical gray matter volume using automatic MRI segmentation and cognitive performance to identify differences between three therapeutic schemes and patients prior to treatment...
February 9, 2018: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/29390424/adult-hippocampal-ganglioneuroblastoma-case-report-and-literature-review
#10
Pei-Sen Yao, Guo-Rong Chen, Huang-Cheng Shang-Guan, Qing-Song Lin, Xing-Fu Wang, Shu-Fa Zheng, De-Zhi Kang
RATIONALE: Intracranial ganglioneuroblastoma represents a rare subtype of primitive neuroectodermal tumor. Here, we report a hippocampal ganglioneuroblastoma and a literature review of cerebral anglioneuroblastoma is carried out. PATIENT CONCERNS: We report a 16-year-old male patient presenting with absence seizure and high-infiltration hippocampal ganglioneuroblastoma. INTERVENTIONS: Magnetic resonance imaging (MRI) indicates a space-occupying lesion with a well-defined margin in the right temporal lobe and hippocampus...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29372691/prediction-of-radiation-necrosis-in-a-rodent-model-using-magnetic-resonance-imaging-apparent-transverse-relaxation-formula-see-text
#11
Jean-Guy Belliveau, Michael D Jensen, James M P Stewart, Igor Solovey, L Martyn Klassen, Glenn S Bauman, Ravi S Menon
BACKGROUND AND PURPOSE: Radiation necrosis remains an irreversible long-term side-effect following radiotherapy to the brain. The ability to predict areas that could ultimately develop into necrosis could lead to prevention and management of radiation necrosis. MATERIALS AND METHODS: Fischer 344 rats were irradiated using two platforms (micro-CT irradiator and x-Rad 225 IGRT) with radiation up to 30 Gy for the micro-CT and 40 Gy for the xRAD-224 to half the brain...
January 26, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29351056/remediation-of-radiation-induced-cognitive-dysfunction-through-oral-administration-of-the-neuroprotective-compound-nsi-189
#12
Barrett D Allen, Munjal M Acharya, Celine Lu, Erich Giedzinski, Nicole N Chmielewski, David Quach, Mike Hefferan, Karl K Johe, Charles L Limoli
Clinical management of primary and secondary central nervous system (CNS) malignancies frequently includes radiotherapy to forestall tumor growth and recurrence after surgical resection. While cranial radiotherapy remains beneficial, adult and pediatric brain tumor survivors suffer from a wide range of debilitating and progressive cognitive deficits. Although this has been recognized as a significant problem for decades, there remains no clinical recourse for the unintended neurocognitive sequelae associated with these types of cancer treatments...
April 2018: Radiation Research
https://www.readbyqxmd.com/read/29344836/boost-irradiation-integrated-to-whole-brain-radiotherapy-in-the-management-of-brain-metastases
#13
Ágnes Dobi, Emese Fodor, Anikó Maráz, Zsófia Együd, Adrienne Cserháti, László Tiszlavicz, Zita Reisz, Pál Barzó, Zoltán Varga, Katalin Hideghéty
Our retrospective analysis aimed to evaluate the clinical value of dose intensification schemes: WBRT and consecutive, delayed, or simultaneous integrated boost (SIB) in brain metastasis (BM) management. Clinical data and overall survival (OS) of 468 patients with BM from various primaries treated with 10 × 3 Gy WBRT (n = 195), WBRT+ 10 × 2 Gy boost (n = 125), or simultaneously 15 × 2.2 Gy WBRT+0.7 Gy boost (n = 148) during a 6-year period were statistically analysed. Significant difference in OS could be detected with additional boost to WBRT (3...
January 17, 2018: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/29332467/is-hippocampal-avoidance-during-whole-brain-radiotherapy-risky-for-patients-with-small-cell-lung-cancer-hippocampal-metastasis-rate-and-associated-risk-factors
#14
Esra Korkmaz Kirakli, Ozgur Oztekin
OBJECTIVES: Hippocampal avoidance during whole-brain radiotherapy is performed to prevent neural stem cell injury causing neurocognitive dysfunction. Nevertheless, the estimated risk of metastases in hippocampal avoidance area in small-cell lung cancer is unknown. The current study aimed to characterize the metastatic distribution within the brain relative to the hippocampus, estimate the incidence of hippocampal metastasis in patients with small-cell lung cancer, and identify clinical and radiographic variables that may be associated with the risk of hippocampal avoidance area metastasis...
December 2017: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/29219117/prediction-of-radiation-necrosis-in-a-rodent-model-using-magnetic-resonance-imaging-apparent-transverse-relaxation-r-sub-2-sub-sup-sup
#15
Jean-Guy Belliveau, Michael D Jensen, James M P Stewart, Igor Solovey, Martyn L Klassen, Glenn S Bauman, Ravi S Menon
Radiation necrosis remains an irreversible long-term side-effect following radiotherapy to the brain. The ability to predict areas that could ultimately develop into necrosis could lead to prevention and management of radiation necrosis.
 Materials and Methods: Fischer 344 rats were irradiated using two platforms (micro-CT irradiator and x-RAD 225 IGRT) with radiation up to 30 Gy for the micro-CT and 40 Gy for the xRAD-224 to half the brain. Animals were subsequently imaged using a 9.4T MRI scanner every 2-4 weeks for up to 28 weeks using a 7-echo gradient echo sequence...
December 8, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29125239/hippocampal-sparing-approach-in-fractionated-stereotactic-brain-vmat-radio-therapy-a-retrospective-feasibility-analysis
#16
Maria Daniela Falco, Stefano Giancaterino, Marco D'Andrea, Ramon Gimenez De Lorenzo, Marianna Trignani, Luciana Caravatta, Clelia Di Carlo, Saide Di Biase, Albina Allajbej, Domenico Genovesi
Volumetric Modulated Arc Therapy (VMAT) techniques for fractioned stereotactic brain radiotherapy (FSBRT) can achieve highly conformal dose distribution to intracranial lesions. However, they can potentially increase the dose to hippocampus (H) causing neurocognitive toxicity during the first four months after irradiation. The purpose of this study was to assess the feasibility of hippocampal-sparing (HS) treatment plans in 22 patients with brain metastasis treated with VMAT technique. Firstly, we retrospectively analyzed hippocampal doses in all 22 VMAT original (not hippocampal-sparing, NHS) plans...
January 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29117865/correction-to-improved-plan-quality-with-automated-radiotherapy-planning-for-whole-brain-with-hippocampus-sparing-a-comparison-to-the-rtog-0933-trial
#17
J Krayenbuehl, M Di Martino, M Guckenberger, N Andratschke
In the original publication [1] figure legends 2 and 4 have been swapped. The original article was updated to rectify this error.
November 8, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29089622/prognosis-of-hippocampal-function-after-sub-lethal-irradiation-brain-injury-in-patients-with-nasopharyngeal-carcinoma
#18
Sharon Chia-Ju Chen, Yoshifumi Abe, Pen-Tzu Fang, Ya-Ju Hsieh, Yung-I Yang, Tzu-Ying Lu, Shoji Oda, Hiroshi Mitani, Shi-Long Lian, Yu-Chang Tyan, Chih-Jen Huang, Tatsuhiro Hisatsune
This work emphasizes the value of assessing hippocampal function by making a timely MRI-based prognosis following a minor dose of hippocampal irradiation after nasopharyngeal carcinomas (NPC) radiotherapy. A quasi-experiment with case-control design and functional assessments (e.g., neuroimaging analysis with fMRI) was conducted to assess hippocampal function after radiotherapy. We delivered 70 Gy of irradiation to nasopharyngeal carcinomas by 6MV helical radiotherapy and collected data from twenty NPC patients and 24 healthy age-matched subjects...
October 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28969706/improved-plan-quality-with-automated-radiotherapy-planning-for-whole-brain-with-hippocampus-sparing-a-comparison-to-the-rtog-0933-trial
#19
J Krayenbuehl, M Di Martino, M Guckenberger, N Andratschke
BACKGROUND: Whole-brain radiation therapy (WBRT) with hippocampus sparing (HS) has been investigated by the radiation oncology working group (RTOG) 0933 trial for patients with multiple brain metastases. They showed a decrease of adverse neurocognitive effects with HS WBRT compared to WBRT alone. With the development of automated treatment planning system (aTPS) in the last years, a standardization of the plan quality at a high level was achieved. The goal of this study was to evaluate the feasibility of using an aTPS for the treatment of HS WBRT and see if the RTOG 0933 dose constraints could be achieved and improved...
October 2, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28951047/hippocampal-dose-during-linac-based-stereotactic-radiotherapy-for-brain-metastases-an-observational-study
#20
Alba Fiorentino, Umberto Tebano, Gianluisa Sicignano, Francesco Ricchetti, Gioacchino Di Paola, Dario Aiello, Niccolò Giaj-Levra, Rosario Mazzola, Sergio Fersino, Ruggero Ruggieri, Filippo Alongi
INTRODUCTION: Aim of the present study is to evaluate homolateral and contralateral hippocampus (H-H, C-H, respectively) dose during Fractionated Stereotactic Radiotherapy (FSRT) or Radiosurgery (SRS) for brain metastases (BM). MATERIALS & METHODS: Patients with BM<5, size≤30mm, KPS≥80 and a life expectancy>3months, were considered for SRS/FSRT (total dose 15-30Gy, 1-5 fractions). For each BM, a Flattening Filter Free (FFF) Volumetric Modulated Arc Therapy (VMAT) plan was generated with one or two arcs...
September 23, 2017: Physica Medica: PM
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