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https://www.readbyqxmd.com/read/29757421/stereotactic-radiosurgery-for-acromegaly-an-international-multicenter-retrospective-cohort-study
#1
Dale Ding, Gautam U Mehta, Mohana Rao Patibandla, Cheng-Chia Lee, Roman Liscak, Hideyuki Kano, Fu-Yuan Pai, Mikulas Kosak, Nathaniel D Sisterson, Roberto Martinez-Alvarez, Nuria Martinez-Moreno, David Mathieu, Inga S Grills, Kevin Blas, Kuei Lee, Christopher P Cifarelli, Gennadiy A Katsevman, John Y K Lee, Brendan McShane, Douglas Kondziolka, L Dade Lunsford, Mary Lee Vance, Jason P Sheehan
BACKGROUND: Stereotactic radiosurgery (SRS) is a treatment option for persistent or recurrent acromegaly secondary to a growth hormone secreting pituitary adenoma, but its efficacy is inadequately defined. OBJECTIVE: To assess, in a multicenter, retrospective cohort study, the outcomes of SRS for acromegaly and determine predictors. METHODS: We pooled and analyzed data from 10 participating institutions of the International Gamma Knife Research Foundation for patients with acromegaly who underwent SRS with endocrine follow-up of ≥6 mo...
May 10, 2018: Neurosurgery
https://www.readbyqxmd.com/read/29745754/modelling-the-influence-of-treatment-time-on-radiosurgery-single-treatment-biological-effectiveness-to-produce-protective-dose-modification-factors
#2
Bleddyn Jones, John W Hopewell
OBJECTIVE: To provide simpler models for adjusting total dose to compensate for significant variations in CNS radio-surgical treatment times, which vary and will influence treatment bio-effectiveness. At present, no allowance is made for time variations. A framework of simpler equations would allow radio-surgical outcomes to be analysed with respect to treatment time, and a system for dose adjustments between radio-isotope and linac-based techniques with different treatment durations...
May 10, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29743581/evolution-of-gamma-knife-capsulotomy-for-intractable-obsessive-compulsive-disorder
#3
REVIEW
Euripedes C Miguel, Antonio C Lopes, Nicole C R McLaughlin, Georg Norén, André F Gentil, Clement Hamani, Roseli G Shavitt, Marcelo C Batistuzzo, Edoardo F Q Vattimo, Miguel Canteras, Antonio De Salles, Alessandra Gorgulho, João Victor Salvajoli, Erich Talamoni Fonoff, Ian Paddick, Marcelo Q Hoexter, Christer Lindquist, Suzanne N Haber, Benjamin D Greenberg, Sameer A Sheth
For more than half a century, stereotactic neurosurgical procedures have been available to treat patients with severe, debilitating symptoms of obsessive-compulsive disorder (OCD) that have proven refractory to extensive, appropriate pharmacological, and psychological treatment. Although reliable predictors of outcome remain elusive, the establishment of narrower selection criteria for neurosurgical candidacy, together with a better understanding of the functional neuroanatomy implicated in OCD, has resulted in improved clinical efficacy for an array of ablative and non-ablative intervention techniques targeting the cingulum, internal capsule, and other limbic regions...
May 9, 2018: Molecular Psychiatry
https://www.readbyqxmd.com/read/29701557/stereotactic-radiosurgery-for-trigeminal-pain-secondary-to-recurrent-malignant-skull-base-tumors
#4
Jack Phan, Courtney Pollard, Paul D Brown, Nandita Guha-Thakurta, Adam S Garden, David I Rosenthal, Clifton D Fuller, Steven J Frank, G Brandon Gunn, William H Morrison, Jennifer C Ho, Jing Li, Amol J Ghia, James N Yang, Dershan Luo, He C Wang, Shirley Y Su, Shaan M Raza, Paul W Gidley, Ehab Y Hanna, Franco DeMonte
OBJECTIVE The objective of this study was to assess outcomes after Gamma Knife radiosurgery (GKRS) re-irradiation for palliation of patients with trigeminal pain secondary to recurrent malignant skull base tumors. METHODS From 2009 to 2016, 26 patients who had previously undergone radiation treatment to the head and neck received GKRS for palliation of trigeminal neuropathic pain secondary to recurrence of malignant skull base tumors. Twenty-two patients received single-fraction GKRS to a median dose of 17 Gy (range 15-20 Gy) prescribed to the 50% isodose line (range 43%-55%)...
April 27, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29688510/study-protocol-early-stereotactic-gamma-knife-radiosurgery-to-residual-tumor-after-surgery-of-newly-diagnosed-glioblastoma-gamma-gbm
#5
Stefanie Brehmer, Mario Alexander Grimm, Alex Förster, Marcel Seiz-Rosenhagen, Grit Welzel, Florian Stieler, Frederik Wenz, Christoph Groden, Sabine Mai, Daniel Hänggi, Frank Anton Giordano
BACKGROUND: Glioblastoma (GBM) is the most common malignant brain tumor in adult patients. Tumor recurrence commonly occurs around the resection cavity, especially after subtotal resection (STR). Consequently, the extent of resection correlates with overall survival (OS), suggesting that depletion of postoperative tumor remnants will improve outcome. OBJECTIVE: To assess safety and efficacy of adding stereotactic radiosurgery (SRS) to the standard treatment of GBM in patients with postoperative residual tumor...
April 24, 2018: Neurosurgery
https://www.readbyqxmd.com/read/29657892/inversion-recovery-sequences-improve-delineation-of-optic-pathways-in-the-proximity-of-suprasellar-lesions
#6
Herwin Speckter, José Bido, Giancarlo Hernandez, Diones Rivera, Luis Suazo, Santiago Valenzuela, Rafael Fermin, Jairo Oviedo, Bernd Foerster, Cesar Gonzalez, Peter Stoeter
Introduction: In Gamma Knife Radiosurgery (GKRS) of suprasellar lesions, the exact localization of the visual pathways is important to avoid radiation induced optic neuropathy (RION). Reliable identification of the optic nerve, chiasm and tracts can be challenging using routine magnetic resonance imaging, especially in patients with lesions compressing the optic structures or in patients who had prior operation of suprasellar tumors. This study investigates the application of inversion recovery sequences (Fast gray and white matter acquisition T1 inversion recovery, FGATIR) to improve identification of the optic pathway...
2018: Journal of Radiosurgery and SBRT
https://www.readbyqxmd.com/read/29652232/long-term-tumor-control-following-stereotactic-radiosurgery-for-jugular-paraganglioma-using-3d-volumetric-segmentation
#7
Neil S Patel, Matthew L Carlson, Bruce E Pollock, Colin L W Driscoll, Brian A Neff, Robert L Foote, Christine M Lohse, Michael J Link
OBJECTIVE The morbidity of gross-total resection of jugular paraganglioma (JP) is often unacceptable due to the potential for irreversible lower cranial neuropathy. Stereotactic radiosurgery (SRS) has been used at the authors' institution since 1990 for the treatment of JP and other benign intracranial tumors. Conventional means of assessing tumor progression using linear measurements or elliptical approximations are imprecise due to the irregular shape and insinuating growth pattern of JP. The objective of this study was to assess long-term tumor control in these patients by using slice-by-slice 3D volumetric segmentation of serial MRI data...
April 13, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29644809/optic-nerve-sheath-meningioma-preliminary-analysis-of-the-role-of-radiation-therapy
#8
Jun Jin, Jin Deok Joo, Jung Ho Han, Hee Kyung Yang, Jeong Min Hwang, Yi Jun Kim, In Ah Kim, Chae Yong Kim
BACKGROUND: The purpose of this study was to evaluate the treatment outcome of our optic nerve sheath meningioma (ONSM) case series in terms of preventing tumor growth and preserving vision in ONSM patients. METHODS: Between July 2003 and March 2015, 1,398 patients with intracranial meningioma were diagnosed at Seoul National University Bundang Hospital. Among them, only 13 patients (0.93%) were diagnosed with ONSM and enrolled in the present study. Tumor volume changes of ONSM patients and their visual acuity were evaluated before and after treatments...
April 2, 2018: Brain Tumor Research and Treatment
https://www.readbyqxmd.com/read/29643777/a-case-of-retinal-detachment-with-unique-optical-coherence-tomography-findings-after-gamma-knife%C3%A2-radiosurgery-treatment-for-choroidal-melanoma
#9
Daisaku Kimura, Teruyo Kida, Takaki Sato, Masanori Fukumoto, Ryohsuke Kohmoto, Shota Kojima, Hiroshi Mizuno, Hitoshi Sakaguchi, Jun Sugasawa, Tsunehiko Ikeda
Purpose: To report a case of retinal detachment with unique optical coherence tomography (OCT) findings after Gamma Knife® (GK; Elekta Instrument AB, Stockholm, Sweden) treatment for choroidal melanoma (CM). Case Report: A 48-year-old woman underwent GK therapy for CM in her right eye from the macula to the temporal side. While the tumor subsequently shrank, the patient developed radiation retinopathy, which was treated with laser photocoagulation. The tumor lesions later subsided; however, her visual acuity (VA) decreased 8 years after the initial treatment...
January 2018: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/29614352/the-place-of-gamma-knife-stereotactic-radiosurgery-in-grade-4-vestibular-schwannoma-based-on-a-case-series-of-86-patients-with-long-term-follow-up
#10
M Lefranc, Leila Maria Da Roz, Anne Balossier, J M Thomassin, P H Roche, J Regis
INTRODUCTION: Grade IV vestibular schwannoma (Koos classification) is generally considered to be an indication for microsurgical resection or combined radiosurgery-microsurgery. However, the place of Gamma knife stereotactic surgery (GK-SRS), either as first-line treatment or when progression of residual tumor compresses the brainstem, has not been clearly evaluated. This article reports the results of a large case series of patients with grade 4 vestibular schwannoma treated by GK-SRS...
March 31, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29611866/gamma-knife-radiosurgery-for-arteriovenous-malformations-general-principles-and-preliminary-results-in-a-swiss-cohort
#11
Matthieu Raboud, Constantin Tuleasca, Philippe Maeder, Luis Schiappacasse, Maud Marguet, Roy Thomas Daniel, Marc Levivier
INTRODUCTION: Arteriovenous malformations (AVMs) are a type of vascular malformation characterised by an abnormal connection between arteries and veins, bypassing the capillary system. This absence of capillaries generates an elevated pressure (hyperdebit), in both the AVM and the venous drainage, increasing the risk of rupture. Management modalities are: observation, microsurgical clipping, endovascular treatment and radiosurgery. The former can be used alone or in the frame of a multidisciplinary approach...
April 3, 2018: Swiss Medical Weekly
https://www.readbyqxmd.com/read/29608701/stereotactic-radiosurgery-for-intracranial-ependymomas-an-international-multicenter-study
#12
Hideyuki Kano, Yan-Hua Su, Hsiu-Mei Wu, Gabriela Simonova, Roman Liscak, Or Cohen-Inbar, Jason P Sheehan, Antonio Meola, Mayur Sharma, Gene H Barnett, David Mathieu, Lucas T Vasas, Anthony M Kaufmann, Rachel C Jacobs, L Dade Lunsford
BACKGROUND: Stereotactic radiosurgery (SRS) is a potentially important option for intracranial ependymoma patients. OBJECTIVE: To analyze the outcomes of intracranial ependymoma patients who underwent SRS as a part of multimodality management. METHODS: Seven centers participating in the International Gamma Knife Research Foundation identified 89 intracranial ependymoma patients who underwent SRS (113 tumors). The median patient age was 16...
March 28, 2018: Neurosurgery
https://www.readbyqxmd.com/read/29605528/cyberknife-stereotactic-radiosurgery-and-radiation-therapy-treatment-planning-system
#13
REVIEW
Chuxiong Ding, Cheng B Saw, Robert D Timmerman
CyberKnife is an image-guided stereotactical dose delivery system designed for both focal irradiation and radiation therapy (SRT). Focal irradiation refers the use of many small beams to deliver highly focus dose to a small target region in a few fractions. The system consists of a 6-MV linac mounted to a robotic arm, coupled with a digital x-ray imaging system. The radiation dose is delivered using many beams oriented at a number of defined or nodal positions around the patients. The CyberKnife can be used for both intracranial and extracranial treaments unlike the Gamma Knife which is limited to intracranial cases...
March 28, 2018: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29594045/cumulative-doses-to-brain-and-other-critical-structures-after-multisession-gamma-knife-stereotactic-radiosurgery-for-treatment-of-multiple-metastatic-tumors
#14
Jianling Yuan, Richard Lee, Kathryn Ellen Dusenbery, Chung K Lee, Damien C Mathew, Paul Wayne Sperduto, Yoichi Watanabe
Purpose: Repeat stereotactic radiosurgery (SRS) is an attractive alternative to whole brain radiation therapy (WBRT) for treatment of recurrent brain metastases (BM). The purpose of this study is to determine the cumulative doses to the brain and critical normal structures in patients who underwent repeat courses of Gamma Knife (GK) SRS. Materials and methods: We retrospectively identified ten patients who received at least three GK-SRS sessions for multiply recurrent BM at our institution from 2013 to 2016...
2018: Frontiers in Oncology
https://www.readbyqxmd.com/read/29572169/surgical-management-of-adverse-radiation-effects-after-gamma-knife-radiosurgery-for-cerebral-arteriovenous-malformations-a-population-based-cohort-study
#15
Pietro Meneghelli, Alberto Pasqualin, Piergiuseppe Zampieri, Michele Longhi, Roberto Foroni, Antonio Sini, Nicola Tommasi, Antonio Nicolato
OBJECTIVE: The goal of this study is to report our experience in the surgical treatment of cAVMs related permanent symptomatic adverse radiation effects (PSARE), in order to clarify an appropriate surgical management and identify the risk factors related to their development. METHODS: We evaluated a total of 549 patients treated with Gamma Knife radiosurgery (GKRS) for cAVMs with a follow-up of at least 8 years. Univariate and multivariate analyses were used to test different risk factors related to the development of PSARE...
March 20, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29541912/correction-to-a-predictive-model-for-distinguishing-radiation-necrosis-from-tumour-progression-after-gamma-knife-radiosurgery-based-on-radiomic-features-from-mr-images
#16
Zijian Zhang, Jinzhong Yang, Angela Ho, Wen Jiang, Jennifer Logan, Xin Wang, Paul D Brown, Susan L McGovern, Nandita Guha-Thakurta, Sherise D Ferguson, Xenia Fave, Lifei Zhang, Dennis Mackin, Laurence E Court, Jing Li
The original version of this article, published on 24 November 2017, unfortunately contained a mistake.
March 14, 2018: European Radiology
https://www.readbyqxmd.com/read/29533338/radiosurgery-of-glomus-tumors-of-temporal-bone-a-meta-analysis
#17
Ronald Sahyouni, Hossein Mahboubi, Omid Moshtaghi, Khodayar Goshtasbi, Sammy Sahyouni, Harrison W Lin, Hamid R Djalilian
OBJECTIVE: 1) Perform a meta-analysis of the available data on the outcomes of stereotactic radiosurgery (SRS) for the treatment of temporal bone glomus tumors (GT), and 2) evaluate the collective outcomes of SRS treatment with respect to tumor control. DATA SOURCES: A thorough literature search of the published English-language literature from 2011 to 2016 was performed in PubMed, Ovid, and Cochrane databases using the keywords ("Gamma Knife" or "CyberKnife" or "linear accelerator" or "radiosurgery") and ("glomus jugulare" or "jugular paraganglioma" or "glomus tympanicum")...
April 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29526937/secondary-brain-neoplasm-after-stereotactic-radiosurgery-in-patients-with-metastatic-non-small-cell-lung-cancer
#18
Shigenari Nukaga, Katsuhiko Naoki, Hiroyuki Yasuda, Ichiro Kawada, Kentaro Ohara, Kenzo Soejima, Tomoko Betsuyaku
Stereotactic radiosurgery (SRS) using the Gamma Knife (GK) is now being increasingly utilized for the treatment of brain metastases. However, there are a few reported cases of SRS-induced brain neoplasms. We herein report the case of a Japanese woman with metastatic non-small cell lung cancer (NSCLC) harboring EGFR-mutations who was treated four times with a GK for brain metastases. She developed glioblastoma 5.7 years after the initial GK surgery. Radiation-induced secondary neoplasms generally appear after a latency period of several years...
March 9, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29514114/long-term-effectiveness-and-safety-of-stereotactic-gamma-knife-surgery-as-a-primary-sole-treatment-in-the-management-of-glomus-jagulare-tumor
#19
Raef F A Hafez, Magad S Morgan, Osama M Fahmy, Hamdy T Hassan
OBJECTIVE: This study aims to report and confirm long-term effectiveness and safety of stereotactic Gamma Knife Surgery as a primary sole treatment in the management of 40 glomus jagulare tumors patients. PATIENTS AND METHODS: Retrospective analysis of clinical and radiological outcomes of 40 GJTs consecutive patients treated with GKS as primary sole treatment at International Medical Center (IMC), Cairo-Egypt from the beginning of 2005 till the end of 2014,with mean follow-up period of 84 months (range 36-156 months), mean tumor volume was 6...
May 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29507849/exceptional-eight-year-response-to-stereotactic-radiosurgery-monotherapy-for-multiple-brain-metastases
#20
Ronny Kalash, Phillip M Pifer, Sushil Beriwal, Scott M Glaser, John A Vargo, Dwight E Heron
Breast cancer represents the second leading cause of brain metastases in women. Once diagnosed, brain metastases have been associated with a rapidly progressive and universally poor prognosis. Breast cancer patients, particularly those with advantageous disease characteristics, may achieve extended survival. This extended life expectancy highlights the importance of effective intracranial treatments that minimize treatment-related late toxicity. Whole brain radiation therapy (WBRT) remains a standard of care palliative option; however, concerns remain regarding the late neurocognitive effects...
December 29, 2017: Curēus
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