Medicine and Health Sciences Commons^™

Download Entire Bodine Journal Volume 1, Issue 1, 2008

Bodine Journal

No abstract provided.

Factors Associated With Severe Late Toxicity After Concurrent Chemoradiation For Locally Advanced Head And Neck Cancer: An Rtog Analysis, Mitchell Machtay, Md, Jennifer Moughan, Ms, Andrew Trotti, Md, Adam S. Garden, Md, Randal S. Weber, Md, Jay S. Cooper, Md, Arlene Forastiere, Md, K. Kian Ang, Md

Bodine Journal

Purpose

Concurrent chemoradiotherapy (CCRT) for squamous cell carcinoma of the head and neck (SCCHN) increases both local tumor control and toxicity. This study evaluates clinical factors that are associated with and might predict severe late toxicity after CCRT.

Methods

Patients were analyzed from a subset of three previously reported RTOG trials of concurrent chemoradiotherapy for locally advanced SCCHN (RTOG 91-11; 97-03; and 99-14). Severe late toxicity was defined in this secondary analysis as chronic Grade 3-4 pharyngeal/laryngeal toxicity (RTOG/EORTC late toxicity scoring system) and/or requirement for a feeding tube ≥2 years after registration and/or potential treatment-related death (e.g. pneumonia) within …

Increasing Tumor Volume Is Predictive Of Poor Overall And Progression-Free Survival: Secondary Analysis Of The Radiation Therapy Oncology Group 93-11 Phase I-Ii Radiation Dose-Escalation Study In Patients With Inoperable Non-Small-Cell Lung Cancer, Maria Werner-Wasik, R. Suzanne Swann, Phd, Jeffrey Bradley, Md, Mary Graham, Md, Bahman Emani, Md, James Purdy, Phd, William Sause, Md

Bodine Journal

Purpose

Patients with non–small-cell lung cancer (NSCLC) in the Radiation Therapy Oncology Group (RTOG) 93-11 trial received radiation doses of 70.9, 77.4, 83.8, or 90.3 Gy. The locoregional control and survival rates were similar among the various dose levels.We investigated the effect of the gross tumor volume (GTV) on the outcome.

Methods and Materials

The GTV was defined as the sum of the volumes of the primary tumor and involved lymph nodes. The tumor response, median survival time (MST), and progression-free survival (PFS) were analyzed separately for smaller (≤45 cm3) vs. larger (>45 cm3) tumors.

Results

The distribution of …

Inhibition Of P73 Function By Pifithrin-Α As Revealed By Studies In Zebrafish Embryos, William R Davidson, Qing Ren, Gabor Kari, Ori Kashi, Adam Dicker Md, Phd, Ulrich Rodeck

Bodine Journal

The p53 family of proteins contains two members that have been implicated in sensitization of cells and organisms to genotoxic stress, i.e., p53 itself and p73. In vitro, lack of either p53 or p73 can protect certain cell types in the adult organism against death upon exposure to DNA damaging agents. The present study was designed to assess the relative contribution of p53 to radiation resistance of an emerging vertebrate model organism, i.e., zebrafish embryos. Consistent with previous reports, suppressing p53 protein expression using antisense morpholino oligonucleotides (MOs) increased survival and reduced gross morphological alterations in zebrafish embryos exposed to …

Vegf Trap In Combination With Radiotherapy Improves Tumor Control In U87 Glioblastoma, Phyllis Wachsberger, Phd, Randy Burd, Phd, Chris Cardi, Ms, Mathew L. Thakur, Constantine Daskalakis, Jocelyn Holash, Phd, George D. Yancopoulos, Phd, Adam Dicker Md, Phd

Bodine Journal

Purpose

To determine the effect of vascular endothelial growth factor VEGF Trap (Regeneron Pharmaceuticals, Tarrytown, NY), a humanized soluble vascular endothelial growth factor (VEGF) receptor protein, and radiation (RT) on tumor growth in U87 glioblastoma xenografts in nude mice.

Methods and Materials

U87 cell suspensions were implanted subcutaneously into hind limbs of nude mice. VEGF Trap (2.5–25 mg/kg) was administered every 3 days for 3 weeks alone or in combination with a single dose of 10 Gy or fractionated RT (3 x 5 Gy). In addition, three scheduling protocols for VEGF Trap plus fractionated RT were examined.

Results

Improved tumor …

A Cone Beam Ct-Based Study For Clinical Target Definition Using Pelvic Anatomy During Post-Prostatectomy Radiotherapy, Timothy Showalter Md, A. Omer Nawaz, Ma, Ying Xiao, James Galvin Phd, Richard K. Valicenti, Md

Bodine Journal

Introduction:

Radiation therapy (RT) is delivered after radical prostatectomy (RP) either as salvage treatment for an elevated prostate-specific antigen (PSA) level1-6 or as adjuvant therapy for patients with highrisk pathologic features7-8. Recent prospective data demonstrated a disease-free survival benefit of adjuvant RT for pathologic T3N0 prostate cancer9-10. Despite literature supporting the delivery of post-RP RT to the prostatic fossa (PF), no clear target definition guidelines exist for intensity modulated radiation therapy (IMRT) or image-guided RT (IGRT)11.

Visualization of the PF is limited on standard CT images, with significant interobserver variability and uncertainty in CTV definition12. Efforts to incorporate complementary imaging …

Toxicity Of Radiotherapy In Patients With Collagen Vascular Disease, Alexander Lin, Md, Eyad Abu-Isa, Md, Kent A. Griffith, Mph, Ms, Edgar Ben-Josef, Md

Bodine Journal

Background

A diagnosis of collagen vascular disease (CVD) may predispose to radiotherapy (RT) toxicity. The objective of the current study was to identify factors that influence RT toxicity in the setting of CVD.

Methods

A total of 86 RT courses for 73 patients with CVD were delivered between 1985 and 2005. CVD subtypes include rheumatoid arthritis (RA; 33 patients), systemic lupus erythematosus (SLE; 13 patients), scleroderma (9 patients), dermatomyositis/polymyositis (5 patients), ankylosing spondylitis (4 patients), polymyalgia rheumatica/temporal arteritis (4 patients), Wegener granulomatosis (3 patients), and mixed connective tissue disorders (MCTD)/other (2 patients). Each patient with CVD was matched to 1 …

Table Of Contents: Bodine Journal Volume 1, Issue 1, Fall 2008

Bodine Journal

No abstract provided.

Download Entire Bodine Journal Volume 2, Issue 1, 2009

Bodine Journal

No abstract provided.

Flexible Needle-Tissue Interaction Modeling With Depth-Varying Mean Parameter: Preliminary Study, Kai Guo Yan, Tarun Podder, Yan Yu, Tien-I Liu, Christopher W.S. Cheng, Wan Sing Ng

Bodine Journal

Flexible needle steering has aroused a lot of research interest in recent years. It has the potential to correct targeting errors, which may be caused by needle bending, tissue deformation, or error in insertion angle. In addition, control and planning based on a steering model can guide the needle to some areas that are currently not amenable to needles because of obstacles, such as bone or sensitive tissues. Thus, there is a clear motivation for needle steering. In this paper, a spring–beam– damper model is proposed to describe the dynamics during the needle–tissue contact procedure. Considering tissue inhomogeneity, depth-varying mean …

Does Intraoperative Radiation Therapy Improve Local Tumor Control In Patients Undergoing Pancreaticoduodenectomy For Pancreatic Adenocarcinoma? A Propensity Score Analysis, Timothy Showalter Md, Atul Rao, Rani Anne Md, Francis E. Rosato, Ernest L Rosato, Jocelyn Andrel, Terry Hyslop, Xia Xu, Adam C. Berger

Bodine Journal

Background:

Locoregional recurrence (LRR) is an important factor after pancreaticoduodenectomy (PD) for pancreatic cancer. IORT administered to the resection bed may improve local tumor control.

Methods:

We performed a retrospective analysis of patients who underwent PD at Thomas Jefferson University Hospital (TJUH) between 1995 and 2005 to identify patients who underwent resection with and without intraoperative radiation therapy (IORT). Data collected included age, gender, complications, margin status, stage, survival, and recurrence. Unadjusted analyses of the IORT and non-IORT groups were performed using Fisher’s chi-square method for discrete variables and Wilcoxon Rank Sum test for continuous variables. To account for biases …

Combination Of Vandetanib, Radiotherapy, And Irinotecan In The Lovo Human Colorectal Cancer Xenograft Model, Phyllis Wachsberger, Phd, Randy Burd, Phd, Anderson Ryan, Phd, Constantine Daskalakis, Phd, Adam Dicker Md, Phd

Bodine Journal

Purpose:

The tumor growth kinetics of the human LoVo colorectal xenograft model was assessed in response to vandetanib, an orally available receptor tyrosine kinase inhibitor, radiotherapy (RT), or irinotecan (CPT-11), as single therapies and in combination.

Methods and Materials:

LoVo cells were injected subcutaneously into the right hind limb (5x106 cells in 100μL phosphate-buffered saline) of athymic NCR NUM mice and tumors were grown to a volume of 200–300mm3 before treatment. Vandetanib was administered at 50 mg/kg daily orally for 14 days starting on Day 1. RT was given as three fractions (3x3 Gy) on Days 1, 2, and 3. …

Nuclear Factor Κb Inhibitors Alleviate And The Proteasome Inhibitor Ps-341 Exacerbates Radiation Toxicity In Zebrafish Embryos, Borbala Daroczi, Gabor Kari, Qing Ren, Adam Dicker Md, Phd, Ulrich Rodeck

Bodine Journal

Inflammatory changes are a major component of the normal tissue response to ionizing radiation, and increased nuclear factor κB (NF-κB) activity is an important mediator of inflammatory responses. Here, we used zebrafish embryos to assess the capacity of two different classes of pharmacologic agents known to target NF-κB to modify radiation toxicity in the vertebrate organism. These were proteasome inhibitors, including lactacystin, MG132, and PS-341 (Bortezomib/VELCADE), and direct inhibitors of NF-κB activity, including ethyl pyruvate (EP) and the synthetic triterpenoid CDDO-TFEA (RTA401), among others. The proteasome inhibitors either did not significantly affect radiation sensitivity of zebrafish embryos (MG132, lactacystin) or …

Bodine Journal, Table Of Contents, Volume 2, Issue 1, Fall 2009

Bodine Journal

No abstract provided.

Jefferson Kimmel Cancer Center Support Groups

Bodine Journal

Listing of Jefferson Kimmel Cancer Center Support Groups.

Research Department Of Radiation Oncology

Bodine Journal

Listing of Basic Research Studies/Grants and Clinical Research Studies/Grants.

Young Investigator Awards

Bodine Journal

Robert Den, MD, Laura Doyle, MS, Nitin Ohri, MD and Evan Wuthrick, MD

New Faculty Members

Bodine Journal

New faculty members: Voichita (Voika) Bar Ad, MD and Wenyin Shi, MD, PhD.

The Gucy2c Tumor Suppressor Is The Nexus Of A Paracrine Hormone Axis Preventing Radiotherapy-Induced Gastrointestinal (Gi) Toxicity, E. J. Wuthrick, P. Li, J. E. Lin, A. P. Dicker, D. Leeper, S. A. Waldman

Bodine Journal

Purpose/Objective: Radiation-induced GI toxicity is the primary dose limitation compromising therapy in cancer patients treated with radiation therapy. GUCY2C is the intestinal receptor for diarrheagenic bacterial enterotoxins and the endogenous paracrine hormones guanylin and uroguanylin. Following genomic insult, cyclic (c)GMP produced by ligand activation of GUCY2C enhances DNA damage sensing and repair in intestinal cells. Here, we show that the GUCY2C-cGMP axis mediates p53-dependent radioprotection of intestinal epithelial cells.

American Society for Therapeutic Radiation Oncology (ASTRO) 52nd Annual Meeting October 31 - November 4, San Diego, CA

Departmental Information-Thomas Jefferson University, Jefferson Medical College, Department Of Radiation Oncology

Bodine Journal

Directory of Attending Physicians, Division of Molecular Radiology, Division of Medical Physics, Radiation Oncology Residents, Medical Physics Residents/Research Staff and Administration.

Chart Rounds In The Digital Age: A Survey Of North American Institutions, M. A. Whiton, A. P. Dicker, E. J. Wuthrick, L. Doyle, A. S. Harrison, Y. R. Lawrence

Bodine Journal

Purpose/Objective(s): In light of public concerns regarding the quality of radiation treatment delivery, we surveyed the utilization of “chart rounds” or peer-review quality assurance meetings, within North American academic institutions.

American Society for Therapeutic Radiation Oncology (ASTRO) 52nd Annual Meeting October 31 - November 4, San Diego, CA

Potential For Dose-Escalation In The Post-Prostatectomy Setting With Intensitymodulated Radiation Therapy: A Dosimetric Study Using Eortc Consensus Guidelines For Target Volume Contours, M. Studenski, A. Harrison, S. Anamalayil, A. Harvey, E. Trabulsi, Y. Xiao, Y. Yu, A. P. Dicker, T. N. Showalter

Bodine Journal

Purpose: Radiation therapy (RT) is delivered after radical prostatectomy (RP) for prostate cancer (PC). Although intensity modulated radiation therapy (IMRT) has become standard in definitive RT for PC, dosimetric data in support of post-RP IMRT are limited. This study was designed to quantify benefits of IMRT versus 3D conformal RT (3DCRT) with respect to dose sparing of rectum and bladder and target volume coverage. Motivated by the desire to deliver higher radiation doses and to quantify the dosimetric impact of IMRT, we retrospectively analyzed images in order to: 1) identify a preferred IMRT beam arrangement; 2) evaluate the dosimetric advantages …

Costs Of Early Adjuvant Radiation Therapy After Radical Prostatectomy: A Decision Analysis, T. N. Showalter, K. A. Foley, E. Jutkowitz, C. Lallas, A. J. Harvey, E. J. Trabulsi, L. G. Gomella, A. P. Dicker, L. T. Pizzi

Bodine Journal

Purpose/Objective(s): Prospective, randomized trials support adjuvant radiation therapy (RT) for adverse pathologic features after radical prostatectomy (RP). However, adjuvant RT is not universally delivered in this setting. Criticisms of adjuvant RT include toxicity, financial costs, potential overtreatment, and effectiveness of salvage RT. The objective of this study was to construct a decision analytic model to estimate real world cost of RT vs. no RT within the context of the effectiveness of early adjuvant RT for prostate patients based on published clinical results of the Southwest Oncology Group prospective trial of adjuvant RT (SWOG 8794).

American Society for Therapeutic Radiation Oncology …

Mirab: An Image-Guided Multichannel Robot For Prostate Brachytherapy, T. Podder, I. Buzurovic, K. Huang, Y. Yu

Bodine Journal

Purpose: To date, twelve robotic systems have been developed worldwide for brachytherapy, especially for seed implantation. However, the only system that has provision for simultaneous insertion of multiple needles is the MIRAB system. This article reports the feasibility and efficacy of the MIRAB robot as ultrasound image-guided autonomous delivery of radioactive seeds for treating prostate cancers.

American Society for Therapeutic Radiation Oncology (ASTRO) 52nd Annual Meeting October 31 - November 4, San Diego, CA

Intensity Modulated Radiation Therapy Compared With 3d Conformal Radiotherapy For Craniospinal Irradiation In Adults – Do We Gain Anything?, X. Shen, M. Studenski, A. Harrison, Y. Xiao, T. Biswas

Bodine Journal

Purpose: Craniospinal irradiation (CSI) remains one of the most technically challenging planning processes in radiation oncology due to its long shape especially in adults and complex target volume. In addition, CSI is associated with significant acute and late morbidities. We undertook a dosimetric analysis to determine if intensity modulated radiation therapy (IMRT) could improve target coverage while sparing normal tissue structures compared to classic 3D conformal radiation (3D‐CRT) planning.

American Society for Therapeutic Radiation Oncology (ASTRO) 52nd Annual Meeting October 31 - November 4, San Diego, CA

Reirradiation For Recurrent Meningioma, N. Ohri, A. Wojcieszynski, J. J. Evans, D. W. Andrews, M. Werner-Wasik

Bodine Journal

Purpose/Objective(s): Management options for meningioma include observation, surgical resection, and radiation therapy (RT). In cases of progressive or recurrent disease after RT, similar options exist. The control rate following a second course of RT is unknown.

American Society for Therapeutic Radiation Oncology (ASTRO) 52nd Annual Meeting October 31 - November 4, San Diego, CA

Prophylactic Radiation Therapy Is Safe And Effective Treatment For The Prevention Of Recurrent Heterotopic Ossification In Elbow And Knee Joints, M. V. Mishra, L. Austin, J. Parvisi, M. Ramsey, T. N. Showalter

Bodine Journal

Background: Background Prophylactic radiation therapy (RT) is an established adjuvant therapy for heterotopic ossification (HO) of the hip when delivered in the immediate pre- or post-operative setting. Its role in prevention of recurrence after excision of HO is supported by randomized trials for HO of the hip, but there is scant evidence to support a similar approach in non-hip joints. In the current study, we evaluate radiologic and functional outcomes after prophylactic radiation therapy (RT) for prevention of HO of the knee and upper extremity [elbow and metacarpophalangeal (MCP) joints].

American Society for Therapeutic Radiation Oncology (ASTRO) 52nd Annual Meeting …

Evolving Role Of Vorinostat Combined With Radiation Therapy In The Treatment Of Brain Tumors, From The Lab To The Clinic, Y. R. Lawrence, P. Wachsberger, Y. Liu, B. Andersen, A. P. Dicker

Bodine Journal

Purpose/Objective(s): Radiation therapy (RT) is a critical element in the treatment of both brain metastases and glioblastoma (GBM). Temozolomide (TMZ) has an established role in the upfront treatment of GBM. Down-regulated mismatch repair (MMR) is a known mechanism of resistance to TMZ. Vorinostat (SAHA), an HDAC inhibitor, has successfully been combined with a number of cytotoxic agents, including ionizing radiation (IR). We performed a series of preclinical and clinical studies to examine the role of SAHA in the treatment of brain tumors.

American Society for Therapeutic Radiation Oncology (ASTRO) 52nd Annual Meeting October 31 - November 4, San Diego, CA

Early Stage Testicular Seminoma: A Multicenter Review Of Treatment Outcomes And Patterns Of Recurrence, M. Kim, E. Wuthrick, A. Lin

Bodine Journal

Purpose/Objective(s): Although overall survival for early stage testicular seminoma is generally excellent, certain pathologic factors can increase recurrence risk for those undergoing observation, while radiation therapy (RT) can be associated with long-term morbidity. We sought to identify disease-related and treatment-related factors that influenced the outcomes, with particular emphasis on recurrence risk, patterns and timing of recurrence, as well as RT-induced malignancy.

American Society for Therapeutic Radiation Oncology (ASTRO) 52nd Annual Meeting October 31 - November 4, San Diego, CA

Substantial Dose-Response Relationship With Clinical Outcome For Lung Stereotactic Body Radiotherapy (Sbrt) Delivered Via Online Image Guidance, L. Kestin, I. Grills, M. Guckenberger, J. Belderbos, A. J. Hope, M. Werner-Wasik, J. J. Sonke, J. P. Bissonnette, Y. Xiao, D. Yan

Bodine Journal

Purpose: To examine potential tumor dose-response relationships with various non-small cell lung cancer (NSCLC) SBRT fractionation regimens delivered with online CT-based image guidance.

American Society for Therapeutic Radiation Oncology (ASTRO) 52nd Annual Meeting October 31 - November 4, San Diego, CA