Successful Embolization Of A Enterocutaneous Fistula Tract With Onyx 34 Following Low Anterior Resection For Rectal Cancer., 2018 George Washington University
Successful Embolization Of A Enterocutaneous Fistula Tract With Onyx 34 Following Low Anterior Resection For Rectal Cancer., Hamza Rahimi, Anthony C Venbrux, Vincent Obias
Radiology Faculty Publications
Enterocutaneous fistulas (ECFs) can be one of the complications found after surgical intervention for rectal cancer. Interventional modalities consisting of surgical, endoscopic, and radiological methods are often implemented to treat postoperative symptomatic complications. We present the case of 61-year-old Caucasian man who presented to us with a recent diagnosis of rectal cancer that had invaded the levators as well as anteriorly into the prostate, and who underwent low anterior resection with a diverting loop ileostomy. The patient was found to have a persistent presacral abscess due to an ECF tract. This case highlights the off-label use of ethylene-vinyl alcohol copolymer ...
Ultrasound-Guided Introital Drainage Of Pyometrocolpos, 2018 George Washington University
Ultrasound-Guided Introital Drainage Of Pyometrocolpos, I Kim, Ranjith Vellody, Hans G. Pohl, Karun Sharma, Kabir Yadav
Radiology Faculty Publications
Pyometrocolpos can be caused by congenital malformations such as distal vaginal atresia and imperforate hymen. Patients usually present with obstructive urinary tract infections, acute kidney injury, or sepsis. Percutaneous drainage of the infected fluid can help treat the patient; however, recurrence is of concern. In this case report, we present a case of a child with recurrent pyometrocolpos due to distal vaginal atresia despite initial percutaneous drainage. To our knowledge, this is the first report of ultrasound-guided introital drainage of pyometrocolpos with relief of symptoms obviating the need for repeat drainage or immediate surgery. © 2017
Defining The Radioresponse Of Mossy Cells, 2018 California State University, San Bernardino
Defining The Radioresponse Of Mossy Cells, Devon Ivy
Electronic Theses, Projects, and Dissertations
Clinical radiotherapy is used to treat a variety of brain tumors within the central nervous system. While effective, it can result in progressive and debilitating cognitive impairment that can diminish quality of life. These impairments have been linked to hippocampal dysfunction and corresponding deficits in spatial learning and memory. Mossy cells are a major population of excitatory neurons located within the dentate hilus and highly involved in hippocampal circuitry. They play critical roles in spatial navigation, neurogenesis, memory, and are particularly vulnerable to a variety of neurotoxic insults. However, their sensitivity to ionizing radiation has yet to be investigated in ...
Recurrent Hotspot Mutations In Hras Q61 And Pi3k-Akt Pathway Genes As Drivers Of Breast Adenomyoepitheliomas., 2018 Memorial Sloan Kettering Cancer Center; Instituto Israelita de Ensino e Pesquisa; Instituto Do Cancer Do Estado de São Paulo
Recurrent Hotspot Mutations In Hras Q61 And Pi3k-Akt Pathway Genes As Drivers Of Breast Adenomyoepitheliomas., Felipe C. Geyer, Anqi Li, Anastasios D. Papanastasiou, Alison Smith, Pier Selenica, Kathleen A. Burke, Marcia Edelweiss, Huei-Chi Wen, Salvatore Piscuoglio, Anne M. Schultheis, Luciano G. Martelotto, Fresia Pareja, Rahul Kumar, Alissa Brandes, Dan Fan, Thais Basili, Arnaud Da Cruz Paula, John R. Lozada, Pedro Blecua, Simone Muenst, Achim A. Jungbluth, Maria P. Foschini, Hannah Y. Wen, Edi Brogi, Juan P. Palazzo, Brian P. Rubin, Charlotte K.Y. Ng, Larry Norton, Zsuzsanna Varga, Ian O. Ellis, Emad A. Rakha, Sarat Chandarlapaty, Britta Weigelt, Jorge S. Reis-Filho
Department of Pathology, Anatomy and Cell Biology Faculty Papers
Adenomyoepithelioma of the breast is a rare tumor characterized by epithelial-myoepithelial differentiation, whose genetic underpinning is largely unknown. Here we show through whole-exome and targeted massively parallel sequencing analysis that whilst estrogen receptor (ER)-positive adenomyoepitheliomas display PIK3CA or AKT1 activating mutations, ER-negative adenomyoepitheliomas harbor highly recurrent codon Q61 HRAS hotspot mutations, which co-occur with PIK3CA or PIK3R1 mutations. In two- and three-dimensional cell culture models, forced expression of HRAS
Effect Of Trinucleotide Repeats In The Huntington's Gene On Intelligence, 2018 University of Iowa
Effect Of Trinucleotide Repeats In The Huntington's Gene On Intelligence, Jessica K. Lee, Amy Conrad, Eric Epping, Kathy Mathews, Vincent Magnotta, Jeffrey D. Dawson, Peg Nopoulos
Stead Family Department of Pediatrics Publications
BACKGROUND: Huntington's Disease (HD) is caused by an abnormality in the HTT gene. This gene includes trinucleotide repeats ranging from 10 to 35, and when expanded beyond 39, causes HD. We previously reported that CAG repeats in the normal range had a direct and beneficial effect on brain development with higher repeats being associated with higher cognitive function. The current study now expands this line of inquiry to evaluate the effects of CAG repeat throughout the entire spectrum of repeats from 15 to 58.
METHODS: We evaluated brain function in children ages 6-18 years old. DNA samples were processed ...
A Microtubule-Dynein Tethering Complex Regulates The Axonemal Inner Dynein F (I1), 2018 University of Yamanashi, Japan
A Microtubule-Dynein Tethering Complex Regulates The Axonemal Inner Dynein F (I1), Tomohiro Kubo, Yuqing Hou, Deborah A. Cochran, George B. Witman, Toshiyuki Oda
Radiology Publications and Presentations
Motility of cilia/flagella is generated by a coordinated activity of thousands of dyneins. Inner dynein arms (IDAs) are particularly important for the formation of ciliary/flagellar waveforms, but the molecular mechanism of IDA regulation is poorly understood. Here, we show using cryo-electron tomography and biochemical analyses of Chlamydomonas flagella that a conserved protein FAP44 forms a complex that tethers IDA f (I1 dynein) head domains to the A-tubule of the axonemal outer doublet microtubule. In wild-type flagella, IDA f showed little nucleotide-dependent movement except for a tilt in the fbeta head perpendicular to the microtubule-sliding direction. In the absence ...
Development And Validation Of A 28-Gene Hypoxia-Related Prognostic Signature For Localized Prostate Cancer., 2018 University of Manchester
Development And Validation Of A 28-Gene Hypoxia-Related Prognostic Signature For Localized Prostate Cancer., Lingjian Yang, Darren Roberts, Mandeep Takhar, Nicholas Erho, Becky A.S. Bibby, Niluja Thiruthaneeswaran, Vinayak Bhandari, Wei-Chen Cheng, Syed Haider, Amy M.B. Mccorry, Darragh Mcart, Suneil Jain, Mohammed Alshalalfa, Ashley Ross, Edward Schaffer, Robert Den, R. Jeffrey Karnes, Eric Klein, Peter J. Hoskin, Stephen J. Freedland, Alastair D. Lamb, David E. Neal, Francesca M. Buffa, Robert G. Bristow, Paul C. Boutros, Elai Davicioni, Ananya Choudhury, Catharine M.L. West
Department of Radiation Oncology Faculty Papers
BACKGROUND: Hypoxia is associated with a poor prognosis in prostate cancer. This work aimed to derive and validate a hypoxia-related mRNA signature for localized prostate cancer.
METHOD: Hypoxia genes were identified in vitro via RNA-sequencing and combined with in vivo gene co-expression analysis to generate a signature. The signature was independently validated in eleven prostate cancer cohorts and a bladder cancer phase III randomized trial of radiotherapy alone or with carbogen and nicotinamide (CON).
RESULTS: A 28-gene signature was derived. Patients with high signature scores had poorer biochemical recurrence free survivals in six of eight independent cohorts of prostatectomy-treated patients ...
Design And Development Of A Phantom For Tomosynthesis With Potential For Automated Analysis Via The Cloud., 2018 George Washington University
Design And Development Of A Phantom For Tomosynthesis With Potential For Automated Analysis Via The Cloud., David Goodenough, Josh Levy, Hildur Olafsdottir, Ingvi Olafsson
Radiology Faculty Publications
This paper describes Development of a Phantom for Tomosynthesis with Potential for Automated Analysis via the Cloud. Several studies are underway to investigate the effectiveness of Tomosynthesis Mammographic Image Screening, including the large TMIST project as funded by the National Cancer Institute https://www.cancer.gov/about-cancer/treatment/clinical-trials/nci-supported/tmist. The development of the phantom described in this paper follows initiatives from the FDA, the AAPM TG245 task group, and European Reference Organization (EUREF) for Quality Assured Breast Screening and Diagnostic Services Committee report noting, that no formal endorsement nor recommendation for use has been sought, or granted by ...
Going Beyond The Final Impression With Radiologic Data In The Era Of Clerical Medicine: A Case Report Of Coronary Artery Disease Found Incidentally On Computed Tomography, 2018 St. Mary's Medical Center
Going Beyond The Final Impression With Radiologic Data In The Era Of Clerical Medicine: A Case Report Of Coronary Artery Disease Found Incidentally On Computed Tomography, Andrea M. Lauffer
Marshall Journal of Medicine
Given the challenges in modern healthcare, physicians find themselves devoting a great deal of mental and emotional energy into executing the appropriate care for patients as well as performing their daily clerical duties. Many clinicians have resorted to innovative ways to minimize their tasks which often leads to narrowing the focus of a patient’s overall care and the birth of medical errors described in the Swiss cheese effect model.
A 66 year old male established care with a new primary care physician. Previous radiologic data revealed a pulmonary nodule that did not have appropriate follow up ...
Surveying The Current State Of International Outreach In Radiology Training Programs, 2018 Pueblo Radiology Group
Surveying The Current State Of International Outreach In Radiology Training Programs, Benjamin Johnson, Wojciech Kapalczynski, Drew Streicher, Henry Chou, Jessie Stewart, Naiim Ali, Supriya Gupta, Staci M. Gagne, Mary W. Huff
Journal of Global Radiology
Purpose: Over the past decade, there has been an increased level of attention focused on improving radiology’s contributions to global health programs in resource-restricted areas of the world. This has led to the formation of new organizations and international imaging partnerships. As a result, there have been related publications and guidelines, which has increased awareness and interest amongst current and prospective radiology trainees.
Methods and Materials: With this survey of residency program directors, we set out to: 1) examine current opinions of and experience with integrating international and outreach opportunities into their training curriculum; and 2) to analyze these ...
Contrast-Enhanced Ultrasound Identifies Early Extrahepatic Collateral Contributing To Residual Hepatocellular Tumor Viability After Transarterial Chemoembolization., 2018 Lankenau Medical Center; Thomas Jefferson University
Contrast-Enhanced Ultrasound Identifies Early Extrahepatic Collateral Contributing To Residual Hepatocellular Tumor Viability After Transarterial Chemoembolization., Sriharsha Gummadi, Maria Stanczak, Andrej Lyshchik, Flemming Forsberg, Colette M. Shaw, John R. Eisenbrey
Department of Radiology Faculty Papers
The mainstay of treatment for unresectable hepatocellular carcinoma is locoregional therapy including percutaneous ablation and transarterial chemo- and radioembolization. While monitoring for tumor response after transarterial chemoembolization is crucial, current imaging strategies are suboptimal. The standard of care is contrast-enhanced magnetic resonance imaging or computed tomography imaging performed at least 4 to 6 weeks after therapy. We present a case in which contrast-enhanced ultrasound identified a specific extra-hepatic collateral from the gastroduodenal artery supplying residual viable tumor and assisting with directed transarterial management.
A Review Of Clinical Radioprotection And Chemoprotection For Oral Mucositis., 2018 George Washington University
A Review Of Clinical Radioprotection And Chemoprotection For Oral Mucositis., Bryan Oronsky, Sharad Goyal, Michelle M Kim, Pedro Cabrales, Michelle Lybeck, Scott Caroen, Neil Oronsky, Erica Burbano, Corey Carter, Arnold Oronsky
Radiology Faculty Publications
The first tenet of medicine, "primum non nocere" or "first, do no harm", is not always compatible with oncological interventions e.g., chemotherapy, targeted therapy and radiation, since they commonly result in significant toxicities. One of the more frequent and serious treatment-induced toxicities is mucositis and particularly oral mucositis (OM) described as inflammation, atrophy and breakdown of the mucosa or lining of the oral cavity. The sequelae of oral mucositis (OM), which include pain, odynodysphagia, dysgeusia, decreased oral intake and systemic infection, frequently require treatment delays, interruptions and discontinuations that not only negatively impact quality of life but also tumor ...
Stochastic Modeling Of Radiation-Induced Dendritic Damage On In Silico Mouse Hippocampal Neurons, 2018 University of Nevada, Las Vegas
Stochastic Modeling Of Radiation-Induced Dendritic Damage On In Silico Mouse Hippocampal Neurons, Eliedonna Cacao, Vipan K. Parihar, Charles L. Limoli, Francis A. Cucinotta
Health Physics & Diagnostic Sciences Faculty Publications
Cognitive dysfunction associated with radiotherapy for cancer treatment has been correlated to several factors, one of which is changes to the dendritic morphology of neuronal cells. Alterations in dendritic geometry and branching patterns are often accompanied by deficits that impact learning and memory. The purpose of this study is to develop a novel predictive model of neuronal dendritic damages caused by exposure to low linear energy transfer (LET) radiation, such as X-rays, gamma-rays and high-energy protons. We established in silico representations of mouse hippocampal dentate granule cell layer (GCL) and CA1 pyramidal neurons, which are frequently examined in radiation-induced cognitive ...
Diagnostic Accuracy Of Pelvic Mri For Determination Of The Cervical Involvement In Endometrial Cancer., 2018 Aga Khan University
Diagnostic Accuracy Of Pelvic Mri For Determination Of The Cervical Involvement In Endometrial Cancer., Imrana Masroor, Sadia Rashid, Shaista Afzal Saeed, Saira Naz, Muhammad Azeemuddin
Department of Radiology
OBJECTIVE: To determine the diagnostic accuracy of pelvic MRI for assessment of the cervical involvement in endometrial cancer.
STUDY DESIGN: Cross-sectional analytical study.
PLACE AND DURATION OF STUDY: Radiology Department of the Aga Khan University Hospital, Karachi from January 2014 to December 2015.
METHODOLOGY: Patients with biopsy-proven endometrial cancer were included, who had both their MRI and histopathological diagnosis performed at our institution. Those patients treated with chemo/radiotherapy or had incomplete medical records, were excluded. The extent of cervical involvement by endometrial carcinoma was seen on T2WI images, and findings were correlated after surgery taking histopathology as the gold ...
Experiences Of The Breast Cancer Patients Undergoing Radiotherapy At A Public Hospital Peshawar Pakistan, 2018 Postgraduate College of Nursing Hayatabad, Peshawar, Pakistan
Experiences Of The Breast Cancer Patients Undergoing Radiotherapy At A Public Hospital Peshawar Pakistan, Gulzar Habibullah, Raisa Raisa, Shanaz Hussein Cassum Sc, Rehana Elahi
School of Nursing & Midwifery
Objective: This study aimed to explore the experiences of female breast cancer patients undergoing radiotherapy (RT) in a public hospital in Peshawar, Pakistan.
Methods: This study employed a descriptive exploratory method. A purposive sample of 14 breast cancer women undergoing RT was selected for this study. Data were collected over the period of 5 months, using a semi-structured interview guide and conducting in-depth face-to-face interviews. These interviews were audio taped and transcribed by a bilingual transcriber. The translated version of the interview was coded, and the analysis was done manually.
Results: Four main categories emerged from data analysis, which were ...
Enriching The Medical Student Radiology Clerkship: Simulating The Radiologist’S Experience, 2018 George Washington University
Enriching The Medical Student Radiology Clerkship: Simulating The Radiologist’S Experience, Liqi Shu, Faraien Bahri, Navid Mostaghni, Ramin Javan
GW Research Days 2016 - Present
Current radiology training in medical schools is still predominantly limited to passively observing the radiologist at the workstation and through lectures, textbooks and online sources. Evaluation is also mainly limited on still image interpretation or knowledge-based multiple-choice questions. Furthermore, students may have specific interests based on their choice of residency. In order to create a tailored and active learning experience, and to evaluate students’ ability in image interpretation, we utilized an open-source web-based Picture archiving and communication system (PACS) named "Weasis" and integrated a report system.
We establish a new PACS teaching system by utilizing the open-source PACS ...
The Pivotal Role Of Mri In The Diagnosis Of Listeria Rhomboencephalitis, 2018 George Washington University
The Pivotal Role Of Mri In The Diagnosis Of Listeria Rhomboencephalitis, K.R Uprety, M Reza Taheri
GW Research Days 2016 - Present
Sixty-six year-old female presented to the Emergency Department with history of several days of headache, malaise, chills, and fatigue with accompanying nausea, vomiting, and inability to tolerate oral intake. She had no history of fever and remained afebrile at the time of presentation. Physical exam and immediate lab values were non-contributory; CSF was obtained and sent for analysis. The patient was placed preemptively on acyclovir, as viral meningitis was the admitting diagnosis. MRI of the brain showed abnormal FLAIR signal hyperintensity and enhancement involving the entire cisternal segment of the left trigeminal nerve, which extended dorsally along the nerve fiber ...
Massive Tumor Thrombus In Left Renal Vein Andiinferior Vena Cava In Renal Cell Carcinoma On 18-Fluorodeoxyglucose Positron Emission Tomography/Computerized Tomography: "Suspension Bridge Sign"., 2018 Aga Khan University
Massive Tumor Thrombus In Left Renal Vein Andiinferior Vena Cava In Renal Cell Carcinoma On 18-Fluorodeoxyglucose Positron Emission Tomography/Computerized Tomography: "Suspension Bridge Sign"., Maseeh Uz Zaman, Nosheen Fatima, Unaiza Zaman, Rabia Tahseen, Sidra Zaman
Department of Radiology
Tumor thrombosis is a relatively uncommon complication of renal cell carcinoma (RCC), and its diagnosis has therapeutic and prognostic implication. Computerized tomography (CT) is the primary imaging modality for staging RCC, but it has low sensitivity to differentiate between tumor thrombus and bland or benign thrombus. 18-fluorodeoxyglucose positron emission tomography/CT (PET/CT) has a limited role in diagnosis and staging of RCC, but its diagnostic accuracy is considerably high for detection of metabolically active tumor thrombus. We are presenting a case of metastatic left-sided RCC with massive hypermetabolic tumor thrombus extending from left kidney to left renal vein and ...
Resolution Of Symptomatic Secondary Empty Sella Syndrome Following Lumbar-Peritoneal Shunt., 2018 Aga Khan University
Resolution Of Symptomatic Secondary Empty Sella Syndrome Following Lumbar-Peritoneal Shunt., Waseem Mehmood Nizamani, Mubbashira Siddiqui, Sehrish Nizar Ali Momin, Waqas Muhammad, Rashid Jooma
Department of Radiology
Background: Post‑surgical empty sella is related to the removal of pituitary tumors either from the transcranial or transphenoidal route, rendering diaphragma sellae incompetent at the end of the procedure. This subsequently leads to herniation of the third ventricle and optic apparatus into the empty sella. Studies have shown that in 50% of the cases, individuals with primary and secondary empty sella syndrome have developed defects in the visual fields. Benign increased intracranial pressure, cerebrospinal rhinorrhea, papilledema, and abnormalities affecting visual acuity may also occur as a result of empty sella.
Case Description: This case report discusses a rare treatment ...
Breast Lesions Detected Via Molecular Breast Imaging: Physiological Parameters Affecting Interpretation, 2018 George Washington University
Breast Lesions Detected Via Molecular Breast Imaging: Physiological Parameters Affecting Interpretation, Jason Ching, Rachel Brem
GW Research Days 2016 - Present
Rationale and Objectives:
To evaluate correlations between molecular breast imaging (MBI) descriptor characteristics and positive predictive value (PPV) in detecting breast cancer.
Materials and Methods:
A retrospective review was performed on 193 suspicious findings from 153 women (31-81 years) with positive MBI examinations. We assessed associations between: (i) lesion pattern (mass vs. non-mass) and PPV; (ii) lesion pattern and suspected likelihood of cancer (low vs. moderate vs. high); (iii) background parenchymal uptake (BPU) (homogeneous vs. heterogeneous) and PPV; (iv) breast density (dense vs. non-dense) and PPV; (v) BPU and density.
One hundred ten of 153 patients were diagnosed with ...