scholarly journals INNV-03. EFFICACY AND LONG-TERM OUTCOMES IN THE MANAGEMENT OF LARGE BRAIN METASTASIS (≥ 4 CM3) USING 2-STAGED STEREOTACTIC RADIOSURGERY (2-SSRS): AN INTERNATIONAL STUDY

2020 ◽  
Vol 22 (Supplement_2) ◽  
pp. ii117-ii117
Author(s):  
Yusuke Hori ◽  
Shoji Yomo ◽  
Wei Wei ◽  
Josue Avecillas-Chasin ◽  
Gene Barnett ◽  
...  
Keyword(s):  
Brain Metastases ◽  
Stereotactic Radiosurgery ◽  
Cox Regression ◽  
Multivariable Analysis ◽  
International Study ◽  
Target Volume ◽  
Local Failure ◽  
Maximum Diameter ◽  
Large Brain

Abstract INTRODUCTION Stereotactic radiosurgery (SRS) for brain metastases results in time-to-local failure (TTLF) that significantly correlates with target volume and prescription dose. For large brain metastases (LBM), defined as ≥ 4 cm3, SRS monotherapy can result in < 40% local control (LC) rates. To overcome the TTLF limitations in the management of LBM, 2-staged SRS (2-SSRS) has demonstrated 6-month LC rates of 85–90%. This international multi-institutional study represents the largest series of patients with LBM managed with 2-SSRS. METHODS 181 patients with 218 LBM treated with 2-SSRS were retrospectively reviewed. Local failure (LF) was defined as ≥ 71.5% volumetric increase (equivalent to ≥ 20% increase in maximum diameter; RECIST criteria) from smallest volume date. Kaplan-Meier and log-rank tests were used to estimate and compare overall survival (OS) and TTLF; multivariable analysis was performed using Cox regression model. RESULTS Median age was 63 years (range: 29‒88), male sex was 50.3% with 34.8% of patients having non-small cell lung cancer. Median follow-up was 13.8 months (range:1.1‒49.4) and median OS was 14.6 months (95%CI: 12.6‒17.0). Median TTLF was 27.9 months (95%CI: 17.9‒NA) with a cumulative 6, 12 and 24-month LC of 91%, 81% and 71%, respectively. Using multivariable analysis, older age (≥ 65 years old; HR 1.58, 95%CI 1.06‒2.35, p=0.02) and larger total volume of concurrent small lesions (> 3 cm3; HR 2.05, 95%CI 1.25‒3.39, p=0.005) negatively impacted OS while younger age (< 65 years old; HR 2.60, 95%CI 1.26‒5.34, p=0.01) and RPA Class 3 (HR 3.10, 95%CI 1.26‒7.65, p=0.01) decreased TTLF. The number of concurrent LBM treated and total volume of the LBM were not significant factors. CONCLUSIONS This large multi-institutional dataset demonstrates excellent efficacy and long-term control of LBMs treated with 2-SSRS, which is independent of number or total volume of concurrent LBM.

scholarly journals Long-Term Survivorship Following Stereotactic Radiosurgery Alone for Brain Metastases: Risk of Intracranial Failure and Implications for Surveillance and Counseling

Neurosurgery ◽  
2017 ◽  
Vol 83 (2) ◽  
pp. 203-209
Author(s):  
Emile Gogineni ◽  
John A Vargo ◽  
Scott M Glaser ◽  
John C Flickinger ◽  
Steven A Burton ◽  
...  
Keyword(s):  
Brain Metastases ◽  
Stereotactic Radiosurgery ◽  
Tumor Volume ◽  
Cox Regression ◽  
Primary Study ◽  
Regression Methods ◽  
Kaplan Meier ◽  
Relapse Rates

Abstract BACKGROUND Historically, survival for even highly select cohorts of brain metastasis patients selected for SRS alone is <2 yr; thus, limited literature on risks of recurrence exists beyond 2 yr. OBJECTIVE To investigate the possibility that for subsets of patients the risk of intracranial failure beyond 2 yr is less than the commonly quoted 50% to 60%, wherein less frequent screening may be appropriate. METHODS As a part of our institutional radiosurgery database, we identified 132 patients treated initially with stereotactic radiosurgery (SRS) alone (± pre-SRS surgical resection) with at least 2 yr of survival and follow-up from SRS. Primary study endpoints were rates of actuarial intracranial progression beyond 2 yr, calculated using the Kaplan–Meier and Cox regression methods. RESULTS The median follow-up from the first course of SRS was 3.5 yr. Significant predictors of intracranial failure beyond 2 yr included intracranial failure before 2 yr (52% vs 25%, P < .01) and total SRS tumor volume ≥5 cc (51% vs 25%, P < .01). On parsimonious multivariate analysis, failure before 2 yr (HR = 2.2, 95% CI: 1.2-4.3, P = .01) and total SRS tumor volume ≥5 cc (HR = 2.3, 95% CI: 1.2-4.3, P = .01) remained significant predictors of intracranial relapse beyond 2 yr. CONCLUSION Relapse rates beyond 2 yr following SRS alone for brain metastases are low in patients who do not suffer intracranial relapse within the first 2 yr and with low-volume brain metastases, supporting a practice of less frequent screening beyond 2 yr. For remaining patients, frequent (every 3-4 mo) screening remains prudent, as the risk of intracranial failure after 2 yr remains high.

Dosimetric comparison of fractionated radiosurgery plans using frameless Gamma Knife ICON and CyberKnife systems with linear accelerator–based radiosurgery plans for multiple large brain metastases

2020 ◽  
Vol 132 (5) ◽  
pp. 1473-1479 ◽  
Author(s):  
Eun Young Han ◽  
He Wang ◽  
Dershan Luo ◽  
Jing Li ◽  
Xin Wang
Keyword(s):  
Brain Metastases ◽  
Gamma Knife ◽  
Linear Accelerator ◽  
Treatment Time ◽  
Target Volume ◽  
Planning System ◽  
Treatment Planning System ◽  
Normal Brain ◽  
Large Brain ◽  
The Mean

OBJECTIVEFor patients with multiple large brain metastases with at least 1 target volume larger than 10 cm3, multifractionated stereotactic radiosurgery (MF-SRS) has commonly been delivered with a linear accelerator (LINAC). Recent advances of Gamma Knife (GK) units with kilovolt cone-beam CT and CyberKnife (CK) units with multileaf collimators also make them attractive choices. The purpose of this study was to compare the dosimetry of MF-SRS plans deliverable on GK, CK, and LINAC and to discuss related clinical issues.METHODSTen patients with 2 or more large brain metastases who had been treated with MF-SRS on LINAC were identified. The median planning target volume was 18.31 cm3 (mean 21.31 cm3, range 3.42–49.97 cm3), and the median prescribed dose was 27.0 Gy (mean 26.7 Gy, range 21–30 Gy), administered in 3 to 5 fractions. Clinical LINAC treatment plans were generated using inverse planning with intensity modulation on a Pinnacle treatment planning system (version 9.10) for the Varian TrueBeam STx system. GK and CK planning were retrospectively performed using Leksell GammaPlan version 10.1 and Accuray Precision version 1.1.0.0 for the CK M6 system. Tumor coverage, Paddick conformity index (CI), gradient index (GI), and normal brain tissue receiving 4, 12, and 20 Gy were used to compare plan quality. Net beam-on time and approximate planning time were also collected for all cases.RESULTSPlans from all 3 modalities satisfied clinical requirements in target coverage and normal tissue sparing. The mean CI was comparable (0.79, 0.78, and 0.76) for the GK, CK, and LINAC plans. The mean GI was 3.1 for both the GK and the CK plans, whereas the mean GI of the LINAC plans was 4.1. The lower GI of the GK and CK plans would have resulted in significantly lower normal brain volumes receiving a medium or high dose. On average, GK and CK plans spared the normal brain volume receiving at least 12 Gy and 20 Gy by approximately 20% in comparison with the LINAC plans. However, the mean beam-on time of GK (∼ 64 minutes assuming a dose rate of 2.5 Gy/minute) plans was significantly longer than that of CK (∼ 31 minutes) or LINAC (∼ 4 minutes) plans.CONCLUSIONSAll 3 modalities are capable of treating multiple large brain lesions with MF-SRS. GK has the most flexible workflow and excellent dosimetry, but could be limited by the treatment time. CK has dosimetry comparable to that of GK with a consistent treatment time of approximately 30 minutes. LINAC has a much shorter treatment time, but residual rotational error could be a concern.

Long-term success of flexible endoscopic septal division with the stag beetle knife for Zenker’s diverticulum: a tertiary center study

2020 ◽  
Vol 33 (11) ◽  
Author(s):  
Sauid Ishaq ◽  
Keith Siau ◽  
Minhong Lee ◽  
Haleema Sultan ◽  
Shalmani H Mohaghegh ◽  
...  
Keyword(s):  
Cox Regression ◽  
Multivariable Analysis ◽  
Zenker’S Diverticulum ◽  
Long Term Outcome ◽  
Zenker's Diverticulum ◽  
Tertiary Center ◽  
Symptom Remission ◽  
Treatment Naïve ◽  
Symptom Recurrence

Summary Objectives Flexible endoscopic septum division is an established treatment for Zenker’s diverticulum (ZD); however, long-term outcome data are lacking. We aimed to evaluate the long-term efficacy of flexible endoscopic septal division (FESD) using the stag beetle knife for ZD and identify predictors of symptom recurrence. Methods Patients undergoing the procedure between 2013 and 2018 were prospectively enrolled. Procedures were performed by a single operator. Symptom severity pre- and postprocedure was recorded using the dysphagia, regurgitation, and complications scale. Symptom recurrence was defined as a total score > 1 after the index procedure. Time-to-event analyses were performed using Kaplan–Meier plots, with multivariable analyses performed using Cox regression models. Results Altogether, 65 patients (mean age 74.0 years, 60% male) were included. Previous stapling had been performed in 44.6% of patients. Over the mean posttreatment follow-up period of 19 months, 5.6% of the treatment naïve group and 34.5% of the recurrent group underwent repeated FESD (P = 0.003), with rates of symptom remission and improvement of 75.4% and 92.7%, respectively. Recurrence at 48 months was higher in patients with recurrent ZD (84.7%) than in treatment-naïve patients (10.7%). On multivariable analysis, recurrent disease (hazard ratio [HR] 20.8, P = 0.005) and younger age (HR 0.96/year, P = 0.047) were associated with symptom recurrence. Conclusions In patients with treatment-naïve ZD, flexible endoscopic septal division is safe and provides durable symptom remission. However, in patients with poststapling recurrence, the risk of recurrence is high and time-dependent.

scholarly journals MRI Texture Analysis for the Prediction of Stereotactic Radiosurgery Outcomes in Brain Metastases from Lung Cancer

2021 ◽  
Vol 10 (2) ◽  
pp. 237
Author(s):  
Jung Hyun Park ◽  
Byung Se Choi ◽  
Jung Ho Han ◽  
Chae-Yong Kim ◽  
Jungheum Cho ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Brain Metastases ◽  
Stereotactic Radiosurgery ◽  
Texture Analysis ◽  
Multivariable Analysis ◽  
Texture Features ◽  
Progression Free Survival ◽  
Clinical Parameter ◽  
Imaging Biomarker ◽  
Local Progression

This study aims to evaluate the utility of texture analysis in predicting the outcome of stereotactic radiosurgery (SRS) for brain metastases from lung cancer. From 83 patients with lung cancer who underwent SRS for brain metastasis, a total of 118 metastatic lesions were included. Two neuroradiologists independently performed magnetic resonance imaging (MRI)-based texture analysis using the Imaging Biomarker Explorer software. Inter-reader reliability as well as univariable and multivariable analyses were performed for texture features and clinical parameters to determine independent predictors for local progression-free survival (PFS) and overall survival (OS). Furthermore, Harrell’s concordance index (C-index) was used to assess the performance of the independent texture features. The primary tumor histology of small cell lung cancer (SCLC) was the only clinical parameter significantly associated with local PFS in multivariable analysis. Run-length non-uniformity (RLN) and short-run emphasis were the independent texture features associated with local PFS. In the non-SCLC (NSCLC) subgroup analysis, RLN and local range mean were associated with local PFS. The C-index of independent texture features was 0.79 for the all-patients group and 0.73 for the NSCLC subgroup. In conclusion, texture analysis on pre-treatment MRI of lung cancer patients with brain metastases may have a role in predicting SRS response.

161: Surgical Resection(S) Plus Stereotactic Radiosurgery (SRS) Versus SRS Alone for Large Brain Metastases: A Comparative Study

2021 ◽  
Vol 163 ◽  
pp. S68
Author(s):  
Barbara-Ann Millar ◽  
Normand Laperriere ◽  
Tatiana Conrad ◽  
Aristotelis Kalyvas ◽  
Gelareh Zadeh ◽  
...  
Keyword(s):  
Brain Metastases ◽  
Comparative Study ◽  
Stereotactic Radiosurgery ◽  
Surgical Resection ◽  
Large Brain

RADT-05. PROSPECTIVE LONG-TERM EVALUATION OF MRI- AND CLINICAL CHANGES FOLLOWING STEREOTACTIC RADIOSURGERY FOR BRAIN METASTASES – IS REPEAT SRS A CONSEQUENCE, OR ALSO A CAUSE OF LONG-TERM SURVIVAL?

2021 ◽  
Vol 23 (Supplement_6) ◽  
pp. vi41-vi42
Author(s):  
Bente Skeie ◽  
Per Øyvind Enger ◽  
Geir Olve Skeie ◽  
Jan Ingemann Heggdal
Keyword(s):  
Brain Metastases ◽  
Stereotactic Radiosurgery ◽  
Whole Brain Radiotherapy ◽  
Cancer Site ◽  
Response Patterns ◽  
Primary Cancer ◽  
Term Survival ◽  
Cover Ratio ◽  
Primary Cancer Site

Abstract The use of stereotactic radiosurgery (SRS) for brain metastases are increasing. Response assessment is challenging and the clinical significance of radiological response and retreatments are poorly defined. Ninety-seven patients with a total of 406 brain metastases were followed prospectively for 10 years or until death. Volume changes over time and clinical outcome in response to first time SRS and SRS retreatments were analyzed. Tumors grew significantly before (p = 0.004), but shrunk at 1 and 3 months (p = 0.001) following SRS. Four response-patterns of were observed; tumors either continuously reduced in size (A, 62%), pseudo-progressed (PP, B, 13%), temporarily reduced in size (C, 24%), or grew continuously (D, 2%); corresponding to 75% local control (LC) at initial SRS. Predictors for LC were primary cancer site (p = 0.001), tumor volume (p = 0.002) and target cover ratio (p = 0.005). Subsequent SRS for new lesions resulted in 94% LC (87% A) and repeat-SRS for local failures in 80% LC (57% B), predicted by higher prescribed dose, p = 0.001 and p = 0.042, respectively. Overall survival was only 4.5 months if A-response for all lesions, 13.3 months if at least one B-response, 17.1 months if retreated C- or D-response (p < 0.001), (7.5 and 4.7 months if untreated). Quality of life (p = 0.003), steroid use (p = 0.019) and prior whole brain radiotherapy (p = 0.026) were predictors for survival. There are 4 response patterns to SRS predicted by tumor size, primary cancer site, target cover ratio and prescribed dose. Long-term survivors experienced a higher incidence of PP and were more often retreated for new lesions and local failures. The immune response induced by PP seems beneficial but further studies are needed.

Hemorrhagic and Cystic Brain Metastases Are Associated With an Increased Risk of Leptomeningeal Dissemination After Surgical Resection and Adjuvant Stereotactic Radiosurgery

Neurosurgery ◽  
2018 ◽  
Vol 85 (5) ◽  
pp. 632-641 ◽  
Author(s):  
Robert H Press ◽  
Chao Zhang ◽  
Mudit Chowdhary ◽  
Roshan S Prabhu ◽  
Matthew J Ferris ◽  
...  
Keyword(s):  
Brain Metastases ◽  
Stereotactic Radiosurgery ◽  
Surgical Resection ◽  
Cumulative Incidence ◽  
Postoperative Radiotherapy ◽  
Multivariable Analysis ◽  
Treatment Strategies ◽  
Competing Risk ◽  
Leptomeningeal Dissemination ◽  
Increased Risk

Abstract BACKGROUND Brain metastases (BM) treated with surgical resection and focal postoperative radiotherapy have been associated with an increased risk of subsequent leptomeningeal dissemination (LMD). BMs with hemorrhagic and/or cystic features contain less solid components and may therefore be at higher risk for tumor spillage during resection. OBJECTIVE To investigate the association between hemorrhagic and cystic BMs treated with surgical resection and stereotactic radiosurgery and the risk of LMD. METHODS One hundred thirty-four consecutive patients with a single resected BM treated with adjuvant stereotactic radiosurgery from 2008 to 2016 were identified. Intracranial outcomes including LMD were calculated using the cumulative incidence model with death as a competing risk. Univariable analysis and multivariable analysis were assessed using the Fine & Gray model. Overall survival was analyzed using the Kaplan-Meier method. RESULTS Median imaging follow-up was 14.2 mo (range 2.5-132 mo). Hemorrhagic and cystic features were present in 46 (34%) and 32 (24%) patients, respectively. The overall 12- and 24-mo cumulative incidence of LMD with death as a competing risk was 11.0 and 22.4%, respectively. On multivariable analysis, hemorrhagic features (hazard ratio [HR] 2.34, P = .015), cystic features (HR 2.34, P = .013), breast histology (HR 3.23, P = .016), and number of brain metastases >1 (HR 2.09, P = .032) were independently associated with increased risk of LMD. CONCLUSION Hemorrhagic and cystic features were independently associated with increased risk for postoperative LMD. Patients with BMs containing these intralesion features may benefit from alternative treatment strategies to mitigate this risk.

Abstract TMP83: Long-term Risk of Venous Thromboembolism After Stroke

Stroke ◽  
2017 ◽  
Vol 48 (suppl_1) ◽  
Author(s):  
Santosh B Murthy ◽  
Alexander E Merkler ◽  
Gino Gialdini ◽  
Abhinaba Chatterjee ◽  
Costantino Iadecola ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Venous Thromboembolism ◽  
Proportional Hazards ◽  
Cox Regression ◽  
Multivariable Analysis ◽  
First Year ◽  
Cumulative Rate ◽  
Incident Cases

Background: There are few data on the long-term risk of venous thromboembolism (VTE) among stroke survivors. We aimed to compare the incidence of VTE amongst patients with ischemic stroke versus those with intracerebral hemorrhage (ICH). Methods: We identified all adults discharged from nonfederal acute care hospitals in CA, NY, and FL between 2005 and 2012 with previously validated ICD-9-CM codes for ischemic stroke and ICH. Our primary outcome of VTE was defined as pulmonary embolism or deep vein thrombosis. To capture incident cases of VTE, we excluded patients with a VTE prior to or during the index stroke. Kaplan-Meier survival statistics were used to calculate the cumulative rate of incident VTE. Cox regression was used to compare the risk of VTE after stroke while adjusting for demographics, vascular risk factors, and Elixhauser comorbidity index. As there was a violation of the proportional-hazards assumption, we calculated separate hazard ratios (HR) for each year of follow-up. Results: We identified 834,660 patients with stroke, of whom 712,440 (85.3%) had ischemic stroke and 112,220 (14.7%) had ICH. Over a mean follow-up of 2.8 (+/-2.4) years, 19,937 (2.4%) developed VTE. After 7 years, the cumulative rate of VTE was 4.7% (95% confidence interval [CI], 4.5-4.9%) in patients with ICH and 4.4% (95% CI, 4.3-4.5%) in patients with ischemic stroke. In multivariable analysis, VTE risk was higher in the first year after ICH compared to ischemic stroke (HR 1.51; 95% CI, 1.43-1.58). However, following the first year, the hazard of VTE was higher among patients with ischemic stroke versus those with ICH (Figure). Conclusions: The risk of VTE after stroke varies by stroke type and time. Patients with ICH have a higher risk of VTE in the first year after stroke as compared to those with ischemic stroke while patients with ischemic stroke have a higher risk beyond 1 year.

RADT-02. FACTORS ASSOCIATED WITH NEW-ONSET SEIZURES AFTER STEREOTACTIC RADIOSURGERY FOR NEWLY DIAGNOSED BRAIN METASTASES

2021 ◽  
Vol 23 (Supplement_6) ◽  
pp. vi41-vi41
Author(s):  
Ethan Srinivasan ◽  
Emily Lerner ◽  
Ryan Edwards ◽  
Aden Haskell-Mendoza ◽  
David Huie ◽  
...  
Keyword(s):  
Brain Metastases ◽  
Stereotactic Radiosurgery ◽  
Target Volume ◽  
Newly Diagnosed ◽  
Single Institution ◽  
Primary Tumor Site ◽  
Significant Difference ◽  
Total Treatment ◽  
Treatment Volume ◽  
New Onset

Abstract INTRODUCTION Stereotactic radiosurgery (SRS) is a highly effective therapy for newly diagnosed brain metastases. Risk factors for new-onset seizures after SRS have not been well established. In this study, we aimed to characterize the variables predictive of seizure risk. METHODS Patients treated with SRS for newly diagnosed brain metastases were retrospectively reviewed at a single institution. Data on baseline demographics, radiation parameters, and clinical courses were collected. RESULTS 120 patients without previous seizure history were identified. Median age was 65 years (56-70.8) and baseline KPS 90 (80-90). 16 (13%) patients developed new-onset seizures within 3 months of SRS. In analyses comparing patients with and without new-onset seizures, there was no association between new-onset seizures and baseline KPS(90:80, p=0.48), prior resection (31%:28%, p=0.76), prior WBRT (6%:10%, p=1), immunotherapy or chemotherapy within 1 month (31%:21%, p=0.52 and 56%:57%, p=1), primary tumor site (p=0.07), number of lesions (2.2:3, p=0.21), cerebellar (25%:37%, p=0.41) or brainstem involvement (19%:14%, p=0.71), irradiated maximum target diameter (2.8:2.0cm p=0.191), maximum target volume (7.6:2.9 cm3 p=0.133), total dose of radiation (25:20Gy, p = 0.12), or use of fractionation (56%:35%, p=0.11). However, there was a significant difference in the total irradiated target volume (11.6 vs. 3.8 cm3, p=0.019) and a trend toward increased post-treatment seizures among patients with a total irradiated volume greater than 10cm3 (20%:9%, p=0.11, OR 2.4 [0.85-6.4]). Patients with seizures were also more likely to have received steroids (69%:34%, p=0.012) and AEDs (28%:15%, p=0.021) prior to SRS. CONCLUSIONS Our data suggest that total treatment volume is associated with new-onset seizures within 3 months of SRS. The association between seizures and exposure to steroids or AEDs prior to SRS may be a surrogate for neurologic symptoms at presentation. Patients undergoing SRS to larger volumes and necessitating prophylactic steroids or AEDs may benefit from counseling or intensification of anti-seizure therapy.

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