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Articles 4081 - 4110 of 9378
Full-Text Articles in Medical Specialties
Terson Syndrome In A Patient With Unrepaired Tetralogy Of Fallot, Amina Saddiqa, Zaid Waqar, Maryam Khalil, Muhammad Anas, Zeeshan Munawar, Ifrah Ayaz, Zakir Jan, Haris Majid
Terson Syndrome In A Patient With Unrepaired Tetralogy Of Fallot, Amina Saddiqa, Zaid Waqar, Maryam Khalil, Muhammad Anas, Zeeshan Munawar, Ifrah Ayaz, Zakir Jan, Haris Majid
Pakistan Journal of Neurological Sciences (PJNS)
Tetralogy of Fallot is the most commonly seen cyanotic congenital heart disease. It includes four cardinal features: right ventricular outflow tract obstruction, misaligned ventricular septal defect, overriding aorta, and concentric right ventricular hypertrophy. Intracranial pathologies such as brain abscesses, cerebrovascular accidents, and intracranial haemorrhage all have been reported with Tetralogy of Fallot. Here we present a case who had subarachnoid haemorrhage with vitreous haemorrhage in Tetralogy of Fallot.
Physician Perceptions On Cancer Screening For Lgbtq+ Patients, Nicolas Nelson, Joseph F. Lombardo, Ayako Shimada, Marissa L. Ruggiero, Alexandria P. Smith, Kevin Ko, Amy E. Leader, Edith P. Mitchell, Nicole L. Simone
Physician Perceptions On Cancer Screening For Lgbtq+ Patients, Nicolas Nelson, Joseph F. Lombardo, Ayako Shimada, Marissa L. Ruggiero, Alexandria P. Smith, Kevin Ko, Amy E. Leader, Edith P. Mitchell, Nicole L. Simone
Department of Radiation Oncology Faculty Papers
The LGBTQ+ community experiences cancer disparities due to increased risk factors and lower screening rates, attributable to health literacy gaps and systemic barriers. We sought to understand the experiences, perceptions, and knowledge base of healthcare providers regarding cancer screening for LGBTQ+ patients. A 20-item IRB-approved survey was distributed to physicians through professional organizations. The survey assessed experiences and education regarding the LGBTQ+ community and perceptions of patient concerns with different cancer screenings on a 5-point Likert scale. Complete responses were collected from 355 providers. Only 100 (28%) reported past LGBTQ+-related training and were more likely to be female (p = …
Expert Search For The "A Scoping Review Of The Relation Between Toothbrushing And Diabetes Knowledge, Glycemic Control, And Oral Health Outcomes In People With Type 2 Diabetes", Kelly K. O'Brien, Ruth D. Lipman
Expert Search For The "A Scoping Review Of The Relation Between Toothbrushing And Diabetes Knowledge, Glycemic Control, And Oral Health Outcomes In People With Type 2 Diabetes", Kelly K. O'Brien, Ruth D. Lipman
Expert Search Strategies
This search strategy was constructed to support the research for the peer reviewed article listed above. Full article abstract:
OBJECTIVE | Given the bidirectional relationship between type 2 diabetes and periodontal disease, this study sought to compile the available data regarding the relationship between home oral hygiene, specifically toothbrushing, and glycemic control and oral health in people with type 2 diabetes
METHODS | A systematic scoping review was conducted using a combination of controlled vocabulary and keyword terms for type 2 diabetes and home oral care in PubMed and CINHAL. Publications from the past 20 years were considered for inclusion. …
Postoperative Radiotherapy And Facial Nerve Outcomes Following Nerve Repair: A Systematic Review, Hannah L. Kenny, Rachel H. Jonas, Samuel L. Oyer
Postoperative Radiotherapy And Facial Nerve Outcomes Following Nerve Repair: A Systematic Review, Hannah L. Kenny, Rachel H. Jonas, Samuel L. Oyer
Department of Otolaryngology - Head and Neck Surgery Faculty Papers
OBJECTIVE: To compare outcomes of facial nerve repair or grafting following facial nerve-sacrificing procedures among patients treated with and without postoperative radiotherapy (RT).
DATA SOURCES: PubMed, OVID, Conference Papers Index, Cochrane Library, ClinicalTrials.gov.
REVIEW METHODS: Databases were searched using terms including "facial nerve," "graft," "repair," and "radiotherapy." Abstracts mentioning facial nerve repair and evaluation of facial nerve function were included for full-text review. Studies that utilized the House-Brackmann or similar validated scale for evaluation of postoperative facial nerve function were selected for review. All identified studies were included in a pooled t test analysis.
RESULTS: Twelve studies with 142 patients …
Measurable Residual Disease And Fusion Partner Independently Predict Survival And Relapse Risk In Childhood Kmt2a-Rearranged Acute Myeloid Leukemia: A Study By The International Berlin-Frankfurt-Münster Study Group, Romy E. Van Weelderen, Kim Klein, Christine J. Harrison, Yilin Jiang, Jonas Abrahamsson, Nira Arad-Cohen, Emmanuelle Bart-Delabesse, Barbara Buldini, Barbara De Moerloose, Michael N. Dworzak, Sarah Elitzur, José M. Fernández Navarro, Robert B. Gerbing, Bianca F. Goemans, Hester A. De Groot-Kruseman, Erin M. Guest, Shau-Yin Ha, Henrik Hasle, Charikleia Kelaidi, Hélène Lapillonne, Guy Leverger, Franco Locatelli, Riccardo Masetti, Takako Miyamura, Ulrika Norén-Nyström, Sophia Polychronopoulou, Mareike Rasche, Jeffrey E. Rubnitz, Jan Stary, Anne Tierens, Daisuke Tomizawa, C Michel Zwaan, Gertjan J L Kaspers
Measurable Residual Disease And Fusion Partner Independently Predict Survival And Relapse Risk In Childhood Kmt2a-Rearranged Acute Myeloid Leukemia: A Study By The International Berlin-Frankfurt-Münster Study Group, Romy E. Van Weelderen, Kim Klein, Christine J. Harrison, Yilin Jiang, Jonas Abrahamsson, Nira Arad-Cohen, Emmanuelle Bart-Delabesse, Barbara Buldini, Barbara De Moerloose, Michael N. Dworzak, Sarah Elitzur, José M. Fernández Navarro, Robert B. Gerbing, Bianca F. Goemans, Hester A. De Groot-Kruseman, Erin M. Guest, Shau-Yin Ha, Henrik Hasle, Charikleia Kelaidi, Hélène Lapillonne, Guy Leverger, Franco Locatelli, Riccardo Masetti, Takako Miyamura, Ulrika Norén-Nyström, Sophia Polychronopoulou, Mareike Rasche, Jeffrey E. Rubnitz, Jan Stary, Anne Tierens, Daisuke Tomizawa, C Michel Zwaan, Gertjan J L Kaspers
Manuscripts, Articles, Book Chapters and Other Papers
Purpose: A previous study by the International Berlin-Frankfurt-Münster Study Group (I-BFM-SG) on childhood KMT2A-rearranged (KMT2A-r) AML demonstrated the prognostic value of the fusion partner. This I-BFM-SG study investigated the value of flow cytometry-based measurable residual disease (flow-MRD) and evaluated the benefit of allogeneic stem-cell transplantation (allo-SCT) in first complete remission (CR1) in this disease.
Methods: A total of 1,130 children with KMT2A-r AML, diagnosed between January 2005 and December 2016, were assigned to high-risk (n = 402; 35.6%) or non-high-risk (n = 728; 64.4%) fusion partner-based groups. Flow-MRD levels at both end of induction 1 (EOI1) …
Long Noncoding Rna Expression Independently Predicts Outcome In Pediatric Acute Myeloid Leukemia., Jason E. Farrar, Jenny L. Smith, Megan Othus, Benjamin J. Huang, Yi-Cheng Wang, Rhonda Ries, Tiffany Hylkema, Era L. Pogosova-Agadjanyan, Sneha Challa, Amanda Leonti, Timothy I. Shaw, Timothy J. Triche, Alan S. Gamis, Richard Aplenc, E Anders Kolb, Xiaotu Ma, Derek L. Stirewalt, Todd A. Alonzo, Soheil Meshinchi
Long Noncoding Rna Expression Independently Predicts Outcome In Pediatric Acute Myeloid Leukemia., Jason E. Farrar, Jenny L. Smith, Megan Othus, Benjamin J. Huang, Yi-Cheng Wang, Rhonda Ries, Tiffany Hylkema, Era L. Pogosova-Agadjanyan, Sneha Challa, Amanda Leonti, Timothy I. Shaw, Timothy J. Triche, Alan S. Gamis, Richard Aplenc, E Anders Kolb, Xiaotu Ma, Derek L. Stirewalt, Todd A. Alonzo, Soheil Meshinchi
Manuscripts, Articles, Book Chapters and Other Papers
Purpose: Optimized strategies for risk classification are essential to tailor therapy for patients with biologically distinctive disease. Risk classification in pediatric acute myeloid leukemia (pAML) relies on detection of translocations and gene mutations. Long noncoding RNA (lncRNA) transcripts have been shown to associate with and mediate malignant phenotypes in acute myeloid leukemia (AML) but have not been comprehensively evaluated in pAML.
Methods: To identify lncRNA transcripts associated with outcomes, we evaluated the annotated lncRNA landscape by transcript sequencing of 1,298 pediatric and 96 adult AML specimens. Upregulated lncRNAs identified in the pAML training set were used to establish a regularized …
Irf7 And Unc93b1 Variants In An Infant With Recurrent Herpes Simplex Virus Infection., Megan H. Tucker, Wei Yu, Heather Menden, Sheng Xia, Carl F. Schreck, Margaret Gibson, Daniel A. Louiselle, T Pastinen, Nikita Raje, Venkatesh Sampath
Irf7 And Unc93b1 Variants In An Infant With Recurrent Herpes Simplex Virus Infection., Megan H. Tucker, Wei Yu, Heather Menden, Sheng Xia, Carl F. Schreck, Margaret Gibson, Daniel A. Louiselle, T Pastinen, Nikita Raje, Venkatesh Sampath
Manuscripts, Articles, Book Chapters and Other Papers
Neonatal herpes simplex virus (HSV) infection is a devastating disease with substantial morbidity and mortality. The genetic basis of susceptibility to HSV in neonates remains undefined. We evaluated a male infant with neonatal skin/eye/mouth (SEM) HSV-1 disease, who had complete recovery after acyclovir but developed HSV-1 encephalitis at 1 year of age. An immune workup showed an anergic PBMC cytokine response to TLR3 stimulation but no other TLRs. Exome sequencing identified rare missense variants in IFN-regulatory factor 7 (IRF7) and UNC-93 homolog B1 (UNC93B1). PBMC single-cell RNA-Seq done during childhood revealed decreased expression of several innate immune genes and a …
Elevated Inos And 3′-Nitrotyrosine In Kaposi's Sarcoma Tumors And Mouse Model, Olga Vladimirova, Samantha Soldan, Chenhe Su, Andrew Kossenkov, Owen Ngalamika, For Yue Tso, John T. West, Charles Wood, Paul M. Lieberman
Elevated Inos And 3′-Nitrotyrosine In Kaposi's Sarcoma Tumors And Mouse Model, Olga Vladimirova, Samantha Soldan, Chenhe Su, Andrew Kossenkov, Owen Ngalamika, For Yue Tso, John T. West, Charles Wood, Paul M. Lieberman
School of Medicine Faculty Publications
Kaposi's Sarcoma (KS) is a heterogenous, multifocal vascular malignancy caused by the human herpesvirus 8 (HHV8), also known as Kaposi's Sarcoma-Associated Herpesvirus (KSHV). Here, we show that KS lesions express iNOS/NOS2 broadly throughout KS lesions, with enrichment in LANA positive spindle cells. The iNOS byproduct 3-nitrotyrosine is also enriched in LANA positive tumor cells and colocalizes with a fraction of LANA-nuclear bodies. We show that iNOS is highly expressed in the L1T3/mSLK tumor model of KS. iNOS expression correlated with KSHV lytic cycle gene expression, which was elevated in late-stage tumors (>4 weeks) but to a lesser degree in …
Head Injury In Older Adults: To Scan Or Not To Scan? Ten Tips To Make The Best Decision, Audrey-Anne Brousseau, Éric Mercier
Head Injury In Older Adults: To Scan Or Not To Scan? Ten Tips To Make The Best Decision, Audrey-Anne Brousseau, Éric Mercier
Journal of Geriatric Emergency Medicine
Ground-level falls are a leading cause of emergency department (ED) visits by older adults. In addition to understanding the cause of the fall, the assessment of potential fall-induced injuries such as traumatic intracranial hemorrhage, can be highly challenging for emergency clinicians. Premorbid conditions, medications and concomitant injuries can all interfere with the physical examination and impact the prevalence of signs traditionally associated with traumatic brain injury (TBI). When it comes to the decision to potentially investigate for a traumatic intracranial hemorrhage with a brain imaging such as a head computed tomography (CT), many potential predictors and factors will be considered. …
Quality Of Glycemic Control In Type 2 Diabetes Mellitus (T2dm) And Its Association With Markers Of Coagulation And Inhibitors Of Fibrinolysis: A Case–Control Study In The Upper West Region, Ghana, Peter K. Selleh, Enoch O. Anto, Wina I. O. Boadu, Benedict Sackey, Lilian A. Boateng, Charles Nkansah, Frederick Nsafoah, Abdul R. Saasi, Selina Mintaah, Yaw A. Wiafe, Charles Derigubah, Emmanuel E. Korsah, Joseph Frimpong, Ezekiel Ansah, Valentine C. K. T. Tamakloe, Patrick Adu, Joseph Boachie, Otchere Addai-Mensah
Quality Of Glycemic Control In Type 2 Diabetes Mellitus (T2dm) And Its Association With Markers Of Coagulation And Inhibitors Of Fibrinolysis: A Case–Control Study In The Upper West Region, Ghana, Peter K. Selleh, Enoch O. Anto, Wina I. O. Boadu, Benedict Sackey, Lilian A. Boateng, Charles Nkansah, Frederick Nsafoah, Abdul R. Saasi, Selina Mintaah, Yaw A. Wiafe, Charles Derigubah, Emmanuel E. Korsah, Joseph Frimpong, Ezekiel Ansah, Valentine C. K. T. Tamakloe, Patrick Adu, Joseph Boachie, Otchere Addai-Mensah
Research outputs 2022 to 2026
Background and Aims: Type 2 diabetes mellitus (T2DM) individuals are at a higher risk of developing diabetes complications, with approximately 80% complication-related mortality. The increased morbidity and mortality among T2DM patients are partly due to dysregulated hemostasis. This study determined the quality of glycemic control in T2DM and its association with markers of coagulation and inhibitors of fibrinolysis. Methods: This case–control study recruited 90 participants involving: 30 T2DM patients with good glycemic control, 30 with poor glycemic control, and 30 nondiabetic subjects as controls at a Municipal Hospital in Ghana. Fasting blood glucose, glycated hemoglobin, activated partial thromboplastin time (APTT), …
The Effects Of Height-For-Age And Hiv On Cognitive Development Of School-Aged Children In Nairobi, Kenya: A Structural Equation Modelling Analysis, Rachel Maina, Jia He, Amina Abubakar, Miguel Perez-Garcia, Manasi Kumar, Jelte M. Wicherts
The Effects Of Height-For-Age And Hiv On Cognitive Development Of School-Aged Children In Nairobi, Kenya: A Structural Equation Modelling Analysis, Rachel Maina, Jia He, Amina Abubakar, Miguel Perez-Garcia, Manasi Kumar, Jelte M. Wicherts
Brain and Mind Institute
Background: Empirical evidence indicates that both HIV infection and stunting impede cognitive functions of school-going children. However, there is less evidence on how these two risk factors amplify each other’s negative effects. This study aimed to examine the direct effects of stunting on cognitive outcomes and the extent to which stunting (partially) mediates the effects of HIV, age, and gender on cognitive outcomes.
Methodology: We applied structural equation modelling to cross-sectional data from 328 children living with HIV and 260 children living without HIV aged 6–14 years from Nairobi, Kenya to test the mediating effect of stunting and predictive …
Clinical Presentation, Evaluation, And Management Of Patients With Myasthenia Gravis At A Tertiary Care Center In Pakistan, Aziz Sonawalla, Shafaq Saleem, Salim Allana, Rabia Qaiser, Rohma Shamsi
Clinical Presentation, Evaluation, And Management Of Patients With Myasthenia Gravis At A Tertiary Care Center In Pakistan, Aziz Sonawalla, Shafaq Saleem, Salim Allana, Rabia Qaiser, Rohma Shamsi
Pakistan Journal of Neurological Sciences (PJNS)
Background and objectives:
Little is known about the clinical profile and outcome of myasthenia gravis in Pakistan. The objective of this study is to review the clinical characteristics of patients with myasthenia gravis in Pakistan, and the outcome of investigations and treatment.
Methods: The study comprised a retrospective review of charts of patients diagnosed with myasthenia gravis at Aga Khan University Hospital in Karachi, Pakistan, over a period of 16 years from 1987 to 2003. The following features were reviewed: (i) clinical presentation, (ii) investigations especially nerve conduction studies, acetylcholine receptor antibodies, and imaging studies of the thorax, (iii) treatments …
Cerebellar Manifestation Secondary To Rectal Neoplasia, Soban Khan, Zaid Waqar, Maryam Khalil, Bushra Khalid, Sajid Ali, Ijaz Ali, Muhammad Tariq, Muhammad Adil
Cerebellar Manifestation Secondary To Rectal Neoplasia, Soban Khan, Zaid Waqar, Maryam Khalil, Bushra Khalid, Sajid Ali, Ijaz Ali, Muhammad Tariq, Muhammad Adil
Pakistan Journal of Neurological Sciences (PJNS)
The condition known as paraneoplastic cerebellar degeneration (PCD) is among the most disabling examples of a cancer's remote effects. Serology for paraneoplastic antibodies, clinical suspicion, and a targeted search for malignancy all play a role in the diagnosis. Tests for neuronal autoantibodies aid in diagnosis and point the way for the search for malignancy. Unfortunately, even with an early diagnosis, existing therapeutic approaches only have little success. Here we present the case of a young male who developed cerebellar syndrome secondary to rectal neoplasia.
Frequency Of Hyperlipedemia In Patients Coming With Ischemic Stroke In Tertiary Care Hospital Karachi, Bushra Ammad, Abdul Malik, Rabia Sana Muhammad, Maryam Javed, Hina Imtiaz
Frequency Of Hyperlipedemia In Patients Coming With Ischemic Stroke In Tertiary Care Hospital Karachi, Bushra Ammad, Abdul Malik, Rabia Sana Muhammad, Maryam Javed, Hina Imtiaz
Pakistan Journal of Neurological Sciences (PJNS)
Background and objective:
Stroke is the second leading cause of death and the third leading cause of disability. This study was designed to determine the frequency of hyperlipidemia in patients with ischemic stroke visiting at a tertiary care hospital in Karachi.
Methods:This was a descriptive cross-sectional study and was done in Department of Medicine, LCMD/ Dar-ul-Sehat Hospital Karachi, Pakistan. A total of 184 patients were studied during the study period of six months and all the consecutive patients were recruited who presented with acute stroke in the department of medicine from the duration April 1st 2022 to September 30th, …
Impact Of Covid-19 On Latinx And Black Communities, Carolina Zuluaga
Impact Of Covid-19 On Latinx And Black Communities, Carolina Zuluaga
Dissertations
This critical literature review project explored the impact of COVID-19 on Latinx and Black communities. According to the Centers for Disease Control and Prevention, as of September 28, 2022, around 16% of COVID-19 cases in the United States were among Latinx people, and 14% of cases were among Black people (Centers for Disease Control and Prevention, 2022). Since COVID-19 began, clinicians have become more conscious of the effects of health disparities within racial and ethnic minorities, which has warranted increased advocacy by educating health and mental health providers and creating and providing resources to these communities and clinicians. The review …
Go With The Flow: An Experimental Analysis With Tubing Alternative With Irrigation., Scott S Hyland, Daniel T Degenova, Joseph P Scheschuk, Benjamin C Taylor
Go With The Flow: An Experimental Analysis With Tubing Alternative With Irrigation., Scott S Hyland, Daniel T Degenova, Joseph P Scheschuk, Benjamin C Taylor
Trauma and Acute Care Articles
BACKGROUND AND AIMS: Literature regarding alternative tubing for fluid delivery in irrigation and debridement procedures is lacking. The purpose of this study was to compare three different apparatuses with varying quantities of irrigation fluid to assess efficiency of administration and evaluate overall time for fluid administration.
METHODS: This model was designed to compare available methods of gravity irrigation used in practice. Fluid flow time was measured for three types of tubing: single-lumen cystoscopy tubing, Y-type double-lumen cystoscopy tubing, and nonconductive suction tubing. Irrigation times were assessed for varying volumes of 3, 6, and 9 L to investigate the relationship between …
Does Proton Arc Therapy Has Potential Clinical Benefits For Hepatocellular Carcinoma?, Peilin Liu, R Dalfsen, M Soukup, Shupeng Chen, Lewei Zhao, Z Wang, X S. Gao, Thomas Quinn, Craig Stevens, Rohan Deraniyagala, Xiaoqiang Li, Xuanfeng Ding
Does Proton Arc Therapy Has Potential Clinical Benefits For Hepatocellular Carcinoma?, Peilin Liu, R Dalfsen, M Soukup, Shupeng Chen, Lewei Zhao, Z Wang, X S. Gao, Thomas Quinn, Craig Stevens, Rohan Deraniyagala, Xiaoqiang Li, Xuanfeng Ding
Conference Presentation Abstracts
Purpose: To investigate the potential clinical benefits and dose-averaged Linear Energy Transfer (LETd) sparing, utilizing proton arc plan for Hepatocellular carcinoma (HCC) patients in comparison with Intensity Modulated Proton Therapy (IMPT). Methods: Ten HCC patients have been retrospectively selected. Two planning groups were created: Proton Arc plans using Monaco ver. 6 and the clinical IMPT plan. Both planning groups used the same robustness parameters. The prescription dose is 67.5 Gy (RBE) in 15 fractions/ 66 GyE in 10 fractions of the Clinical Target Volume (CTV) following clinical IMPT plan. Robustness evaluations were performed to ensure target dose coverage. Normal Tissue …
A Novel Planning Framework For The Efficient Spot-Scanning Proton Arc Therapy Via The Particle Swarm Optimization (Sparc-Particle Swarm), Y Qian, R Dao, G Liu, Xiaoqiang Li, H Quan, Xuanfeng Ding
A Novel Planning Framework For The Efficient Spot-Scanning Proton Arc Therapy Via The Particle Swarm Optimization (Sparc-Particle Swarm), Y Qian, R Dao, G Liu, Xiaoqiang Li, H Quan, Xuanfeng Ding
Conference Presentation Abstracts
Purpose: The delivery efficiency is the bottleneck of spot-scanning proton arc therapy (SPArc) because of the numerous energy layers (EL) ascending switches. This study aims to develop a new algorithm to mitigate the need of EL ascending via water equivalent thickness (WET) sector selection followed by the particle swarm optimization (SPArc- particle swarm). Methods: SPArc- particle swarm divided the full arc trajectory into the optimal sectors based on the K-means clustering analysis of the relative mean WET. Within the sector, particle swarm optimization was used to minimize the total energy switch time, in which it optimized the energy selection integrated …
Application Of A Novel Optical Tool For Linac Calibrations, Cory S. Knill, Brian Loughery, Raminder P. Sandhu, Lifeng Lin, Mark Stefani
Application Of A Novel Optical Tool For Linac Calibrations, Cory S. Knill, Brian Loughery, Raminder P. Sandhu, Lifeng Lin, Mark Stefani
Conference Presentation Abstracts
Purpose: Maintaining a linac within tight stereotactic isocentricity tolerances requires minimizing errors in individual components of the linac. However, while isocentricity can be measured using a Winston-Lutz test, contributions from individual components can be difficult to discern. The disconnect between how individual components contribute to isocentricity can lead to lengthy troubleshooting exercises when isocentricity is outside tolerance. To provide more info rmation to physicists and increase the speed of isocentricity adjustments, a new tool that uses optical tracking to investigate and adjust individual linac components that contribute to isocentricity was tested on three clinical linacs. Methods: The optical tracking tool …
Individual Vmat Beam Complexity Indices Have Limited Predictive Value For Qa Pass-Rates, Jian Liang, Q Liu, David T. To, Michael G. Snyder
Individual Vmat Beam Complexity Indices Have Limited Predictive Value For Qa Pass-Rates, Jian Liang, Q Liu, David T. To, Michael G. Snyder
Conference Presentation Abstracts
Purpose: Previous studies with sample sizes <400 have indicated that VMAT beam complexity indices may have a relationship with measured QA pass-rates. The aim of this study is to evaluate such relationships on a large scale to further investigate their strength. Methods: Total of 17,273 VMAT QA results across 8 Elekta Agility machines were used in this study. All beams were flattened 6MV or 10MV. Sun Nuclear ArcCheck was used for QA measurements with γ-analysis parameters of 10% threshold, 3% dose difference, 2mm distance to agreement, and 95% passing threshold. A total 214 Beams (1.23%) failed QA. QA distributions in Pinnacle were calculated with 2 degree gantry intervals and a dose grid of 2mm. Four complexity indices (MCSv, MU weighted Segment Area, Segment Area/Perimeter, and Average Leaf Gap) were computed. Spearman’s correlations were evaluated for each, and cut-off values for the indices were sought to indicate values above which no QA failures would be expected. Results: Evaluation of the 4 complexity metrics showed weak correlation with QA pass rates (< ±0.42) with high significance (p < 0.001). When metrics were evaluated independently, cut-off values from correlation plots separated only 0.67%, 0.72%, 2.2%, 6.3% guaranteed passing beams from the total sample, respectively. When evaluating whether anymetric for a given beam exceeded its cut-off, the fraction of guaranteed passing beams rose to only 6.6%. However, when cut-off values for one metric were allowed to be functionally dependent upon another, the fraction of guaranteed passing beams increased. For MU weighted Segment Area andAverage Leaf Gap, a dependent approach separated 19.1% guaranteed passing beams from the sample. Conclusion: Individual complexity metrics have weak predictive utility in assessing plan performance. However, using multiple complexity cut-off functions with dependence upon more than one metric increased the fraction of predicted passing beams by around 300%.
Particle Arc Single-Isocenter Stereotactic Radiosurgery Of Multiple Brain Metastases, L Volz, S Mein, T Tessonnier, Peilin Liu, A Mairani, M Durante, Xuanfeng Ding, C Graeff, T Li
Particle Arc Single-Isocenter Stereotactic Radiosurgery Of Multiple Brain Metastases, L Volz, S Mein, T Tessonnier, Peilin Liu, A Mairani, M Durante, Xuanfeng Ding, C Graeff, T Li
Conference Presentation Abstracts
Purpose: To develop spot-scanning proton (SPArc) and heavy ion (SHArc) arc therapy for single-isocenter stereotatic radiosurgery (SISRS) of multiple brain metastases (MBMs). First results achieved with dedicated planning infrastructure are compared to state-of-the -art volumetric modulated photon arc therapy (HA-VMAT). Methods: A multi-institutional collaboration was established to develop bespoke SPArc and SHArc SISRS infrastructure with available research and commercial treatment planning systems. Devised planning and delivery methods considered dedicated energy, spot, and multi-arc selection strategies. SPArc and SHArc (carbon and helium ions) plans were generated for MBM patients exhibiting 3-12 intracranial lesions with GTV volumes between 0.03ccm and 19.8ccm, at …
Develop A Novel Beam Orientation Optimization Algorithm For Let (Linear Energy Transfer) Incorporated Impt (Intensity Modulated Proton Therapy) (Imptlet, R Dao, Y Qian, Xiaoqiang Li, H Quan, Xuanfeng Ding, G Liu
Develop A Novel Beam Orientation Optimization Algorithm For Let (Linear Energy Transfer) Incorporated Impt (Intensity Modulated Proton Therapy) (Imptlet, R Dao, Y Qian, Xiaoqiang Li, H Quan, Xuanfeng Ding, G Liu
Conference Presentation Abstracts
Purpose: To improve the dose and LET distribution in the IMPTLET, we introduce a new optimization algorithm to search for the optimal beam orientation and count through the arc trajectory (BOC-IMPTLET). Methods: We introduce kmeans clustering analysis in the BOC-IMPTLET algorithm by analyzing the distribution of LET in the target from the full arc trajectory. The optimal of cluster count was used as beam count, which was determined based on the SSE (Sum of Square Error) value and the angle of the corresponding centroid of each cluster was used as beam orientation, respectively. The BOC-IMPTLET algorithm was implemented in the …
Predicting Tumor Voxel Dose-Response Using Deep Learning On Serial Fdg-Pet Feedback Images, Shupeng Chen, Di Yan, An Qin, Rohan Deraniyagala, Daniel Krauss, Peter Chen, Craig Stevens
Predicting Tumor Voxel Dose-Response Using Deep Learning On Serial Fdg-Pet Feedback Images, Shupeng Chen, Di Yan, An Qin, Rohan Deraniyagala, Daniel Krauss, Peter Chen, Craig Stevens
Conference Presentation Abstracts
Purpose: Tumor voxel dose-response matrix (DRM) can be assessed using a series of FDG-PET/CT feedback images acquired during radiotherapy. Predicting the tumor voxel DRM earlier is crucial for treatment adaptation. However, it is also challenging due to FDG fluctuation in tumor cells. This study investigated the feasibility of predicting DRM during early treatment weeks using deep learning (DL). Methods: FDG-PET images were acquired at the pretreatment (preTx), the 2nd and 4th weeks during chemo-radiotherapy (35×2Gy) from 50 head and neck patients. The reference value of tumor voxel DRM (DRMref), representing the average metabolic change ratio during the treatment, was determined …
Linac-Based Srs Treatments Slow Down Unnecessarily Due To Parked Leaf Optimization, Brian Loughery, Cory S. Knill, Raminder P. Sandhu, Lifeng Lin, Jian Liang
Linac-Based Srs Treatments Slow Down Unnecessarily Due To Parked Leaf Optimization, Brian Loughery, Cory S. Knill, Raminder P. Sandhu, Lifeng Lin, Jian Liang
Conference Presentation Abstracts
Purpose: It was observed on a VersaHD that clinical SRS deliveries created in the Elements treatment planning system (TPS) slowed gantry rotation and dose rate to allow parked MLC leaves to move into position for use in an upcoming control point. Gantry rotation slowed suddenly, visibly backtracking to previous gantry angles. The purpose of this work is to study the effect of parked MLC positioning parameters in Elements on cranial SRS delivery speed and gantry motion on a VersaHD. Methods: To study the effect of parked MLC leaf positions on VersaHD deliverability, cranial SRS plans were generated with different TPS …
Internal Lead Shielding For Clinical Electron Treatments, Patrick N. Mcdermott
Internal Lead Shielding For Clinical Electron Treatments, Patrick N. Mcdermott
Conference Presentation Abstracts
Purpose: Electron beams are often used to treat superficial lesions of the lip, cheek, nose and ear. Lead is frequently used to block distal structures. It is customary to place an internal bolus of low atomic number in between the tissue and the lead to reduce electron backscatter from the lead. Space for the lead and the internal bolus is quite limited. The current method, recommended by TG25, for estimating the thickness of the lead plus internal bolus is not self-consistent and leads to a larger than necessary thickness. Furthermore, this method uses an older expression for the electron backscatter …
5s Rrna Pseudogene Transcripts Are Associated With Interferon Production And Inflammatory Responses In Alcohol-Associated Hepatitis, Jianguo Wu, Adam Kim, Xiaoqin Wu, Semanti Ray, Daniela S Allende, Nicole Welch, Annette Bellar, Jaividhya Dasarathy, Srinivasan Dasarathy, Laura E Nagy
5s Rrna Pseudogene Transcripts Are Associated With Interferon Production And Inflammatory Responses In Alcohol-Associated Hepatitis, Jianguo Wu, Adam Kim, Xiaoqin Wu, Semanti Ray, Daniela S Allende, Nicole Welch, Annette Bellar, Jaividhya Dasarathy, Srinivasan Dasarathy, Laura E Nagy
Faculty, Staff and Student Publications
BACKGROUND AND AIMS: Interferon (IFN) signaling is critical to the pathogenesis of alcohol-associated hepatitis (AH), yet the mechanisms for activation of this system are elusive. We hypothesize that host-derived 5S rRNA pseudogene (RNA5SP) transcripts regulate IFN production and modify immunity in AH.
APPROACH AND RESULTS: Mining of transcriptomic datasets revealed that in patients with severe alcohol-associated hepatitis (sAH), hepatic expression of genes regulated by IFNs was perturbed and gene sets involved in IFN production were enriched. RNA5SP transcripts were also increased and correlated with expression of type I IFNs. Interestingly, inflammatory mediators upregulated in sAH, but not in other liver …
Camonsertib In Dna Damage Response-Deficient Advanced Solid Tumors: Phase 1 Trial Results, Timothy A Yap, Elisa Fontana, Elizabeth K Lee, David R Spigel, Martin Højgaard, Stephanie Lheureux, Niharika B Mettu, Benedito A Carneiro, Louise Carter, Ruth Plummer, Gregory M Cote, Funda Meric-Bernstam, Joseph O'Connell, Joseph D Schonhoft, Marisa Wainszelbaum, Adrian J Fretland, Peter Manley, Yi Xu, Danielle Ulanet, Victoria Rimkunas, Mike Zinda, Maria Koehler, Ian M Silverman, Jorge S Reis-Filho, Ezra Rosen
Camonsertib In Dna Damage Response-Deficient Advanced Solid Tumors: Phase 1 Trial Results, Timothy A Yap, Elisa Fontana, Elizabeth K Lee, David R Spigel, Martin Højgaard, Stephanie Lheureux, Niharika B Mettu, Benedito A Carneiro, Louise Carter, Ruth Plummer, Gregory M Cote, Funda Meric-Bernstam, Joseph O'Connell, Joseph D Schonhoft, Marisa Wainszelbaum, Adrian J Fretland, Peter Manley, Yi Xu, Danielle Ulanet, Victoria Rimkunas, Mike Zinda, Maria Koehler, Ian M Silverman, Jorge S Reis-Filho, Ezra Rosen
Faculty, Staff and Student Publications
Predictive biomarkers of response are essential to effectively guide targeted cancer treatment. Ataxia telangiectasia and Rad3-related kinase inhibitors (ATRi) have been shown to be synthetic lethal with loss of function (LOF) of ataxia telangiectasia-mutated (ATM) kinase, and preclinical studies have identified ATRi-sensitizing alterations in other DNA damage response (DDR) genes. Here we report the results from module 1 of an ongoing phase 1 trial of the ATRi camonsertib (RP-3500) in 120 patients with advanced solid tumors harboring LOF alterations in DDR genes, predicted by chemogenomic CRISPR screens to sensitize tumors to ATRi. Primary objectives were to determine safety and propose …
Phase Ii Trial Of Nelipepimut-S Peptide Vaccine In Women With Ductal Carcinoma In Situ, Anne E O'Shea, Guy T Clifton, Na Qiao, Brandy M Heckman-Stoddard, Malgorzata Wojtowicz, Eileen Dimond, Isabelle Bedrosian, Diane Weber, Judy E Garber, Alexander Husband, Ricardo Pastorello, J Jack Lee, Mike Hernandez, Diane D Liu, Lana A Vornik, Powel H Brown, Gheath Alatrash, George E Peoples, Elizabeth A Mittendorf
Phase Ii Trial Of Nelipepimut-S Peptide Vaccine In Women With Ductal Carcinoma In Situ, Anne E O'Shea, Guy T Clifton, Na Qiao, Brandy M Heckman-Stoddard, Malgorzata Wojtowicz, Eileen Dimond, Isabelle Bedrosian, Diane Weber, Judy E Garber, Alexander Husband, Ricardo Pastorello, J Jack Lee, Mike Hernandez, Diane D Liu, Lana A Vornik, Powel H Brown, Gheath Alatrash, George E Peoples, Elizabeth A Mittendorf
Faculty, Staff and Student Publications
UNLABELLED: NeuVax is a vaccine comprised of the HER2-derived MHC class I peptide E75 (nelipepimut-S, NPS) combined with GM-CSF. We completed a randomized trial of preoperative vaccination with NeuVax versus GM-CSF alone in patients with ductal carcinoma in situ (DCIS). The primary objective was to evaluate for NPS-specific cytotoxic T lymphocyte (CTL) responses. Patients with human leukocyte antigen (HLA)-A2-positive DCIS were enrolled and randomized 2:1 to NeuVax versus GM-CSF alone and received two inoculations prior to surgery. The number of NPS-specific CTL was measured pre-vaccination, at surgery, and 1 and 3 to 6 months post-operation by dextramer assay. Differences in …
Learning Through Doing: Comprehensive Programming For A Training Program In Cancer Disparities, Kayce D Solari Williams, Kamisha Hamilton Escoto, Crystal Roberson, Kathy Le, Lorraine R Reitzel, Lorna H Mcneill, Shine Chang
Learning Through Doing: Comprehensive Programming For A Training Program In Cancer Disparities, Kayce D Solari Williams, Kamisha Hamilton Escoto, Crystal Roberson, Kathy Le, Lorraine R Reitzel, Lorna H Mcneill, Shine Chang
Faculty, Staff and Student Publications
In the United States, preparing researchers and practitioners for careers in cancer requires multiple components for success. In this reflection article, we discuss our approach to designing a comprehensive research training program in cancer disparities. We focused on elements that provide students and early career scientists a deep understanding of disparities through first-hand experiences and skills training necessary to build a research career in the area. Our Educational Program sits within the framework of an NCI P20 program, "UHAND (University of Houston/MD Anderson Cancer Center)", jointly established by an NCI-designated comprehensive cancer center and a minority-serving university as a collaborative …
Piloting The Sexual And Gender Minority Cancer Curricular Advances For Research And Education (Sgm Cancer Care) Workshop: Research Training In The Service Of Sgm Cancer Health Equity, Miria Kano, Irene Tamí-Maury, Mandi L Pratt-Chapman, Shine Chang, Mikaela Kosich, Gwendolyn P Quinn, Tonia Poteat, Peter A Kanetsky, Ronit Elk, Ulrike Boehmer, Julian Sanchez, Charles Kamen, Nelson F Sanchez
Piloting The Sexual And Gender Minority Cancer Curricular Advances For Research And Education (Sgm Cancer Care) Workshop: Research Training In The Service Of Sgm Cancer Health Equity, Miria Kano, Irene Tamí-Maury, Mandi L Pratt-Chapman, Shine Chang, Mikaela Kosich, Gwendolyn P Quinn, Tonia Poteat, Peter A Kanetsky, Ronit Elk, Ulrike Boehmer, Julian Sanchez, Charles Kamen, Nelson F Sanchez
Faculty, Staff and Student Publications
The purpose of this study is to describe the context, curriculum design, and pilot evaluation of the educational program "Sexual and Gender Minority Cancer Curricular Advances for Research and Education" (SGM Cancer CARE), a workshop for early-career researchers and healthcare providers interested in gaining knowledge and skills in sexual and gender minority (SGM) cancer research and healthcare advocacy. A needs assessment of a sample of clinicians and researchers (n = 104) and feedback from an Advisory Board informed the curriculum design of the SGM Cancer CARE workshop. Four SGM-tailored modules, focusing on epidemiology, clinical research, behavioral science and interventions, and …