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Full-Text Articles in Medicine and Health Sciences

What Are The Factors That Predict Outcome At Relapse After Previous Esophagectomy And Adjuvant Therapy In High-Risk Esophageal Cancer?, Edward Yu, P. Tai, R. Malthaner, L. Stitt, G. Rodrigues, R. Dar, B. Yaremko, J. Younus, M. Sanatani, M. Vincent, B. Dingle, D. Fortin, R. Inculet Oct 2010

What Are The Factors That Predict Outcome At Relapse After Previous Esophagectomy And Adjuvant Therapy In High-Risk Esophageal Cancer?, Edward Yu, P. Tai, R. Malthaner, L. Stitt, G. Rodrigues, R. Dar, B. Yaremko, J. Younus, M. Sanatani, M. Vincent, B. Dingle, D. Fortin, R. Inculet

Edward Yu

OBJECTIVES: The present study investigated factors affecting outcome at relapse after previous surgery and adjuvant chemoradiation (crt) in high-risk esophageal cancer patients. PATIENTS AND METHODS: From 1989 to 1999, we followed high-risk resected esophageal cancer patients who had completed postoperative crt therapy. Patients who relapsed with a disease-free interval of less than 3 months were treated with palliative crt when appropriate. Patients with a disease-free interval of 3 months or more were treated with best supportive care. Post-recurrence survival was estimated using the Kaplan-Meier technique, and statistical comparisons were made using log-rank chi-square tests and Cox regression. RESULTS: Of the …


Post-Operative Extended Volume External Beam Radiation Therapy Is Safe For High Risk Esophageal Cancer Patients, Edward Yu, Patricia Tai, Jawaid Younus, Richard Malthaner, Larry Stitt, Pauline Truong, George Rodrigues, Robert Ash, Rashid Dar, Anna Tomiak, Mark Vincent, Walter Kocha, Brian Dingle, Richard Inculet Nov 2009

Post-Operative Extended Volume External Beam Radiation Therapy Is Safe For High Risk Esophageal Cancer Patients, Edward Yu, Patricia Tai, Jawaid Younus, Richard Malthaner, Larry Stitt, Pauline Truong, George Rodrigues, Robert Ash, Rashid Dar, Anna Tomiak, Mark Vincent, Walter Kocha, Brian Dingle, Richard Inculet

Edward Yu

Post-operative radiation therapy (RT) (1) and post-operative chemoradiation (2) have been used for esophageal cancer patients deemed high risk for recurrence after esophagectomy. Defining opitmal RT target volume after esophagectomy is difficult due to significant changes in patient anatomy and function. Some radiationon cologists advocated the inclusion of the anastomotic site within the irradiation volume due to concerns for potential increased relapse risk, while others did not subscribe to this practice due to concerns for increased treatment related toxicity. We have previously reported patient outcome benefit using extended volume RT In management with high risk esophageal cancer patients underwent esopagectomy(3). …


Extended Vs. Small Field Irradiation In High Risk Post Esophagectomy Patients Receiving Combined Chemoradiation Therapy: A Decade Experience In Treatment Of Esophageal Cancer, Edward Yu, Patricia Tai, George Rodrigues, Robert Ash, Larry Stitt, Rashid A. Dar, Pauline Truong, Gregory M. Videtic, Richard Malthaner, Richard Inculet, Anna Tomiak, Jawaid Younus, Brian Dingle, Walter Kocha, Mark Vincent Nov 2009

Extended Vs. Small Field Irradiation In High Risk Post Esophagectomy Patients Receiving Combined Chemoradiation Therapy: A Decade Experience In Treatment Of Esophageal Cancer, Edward Yu, Patricia Tai, George Rodrigues, Robert Ash, Larry Stitt, Rashid A. Dar, Pauline Truong, Gregory M. Videtic, Richard Malthaner, Richard Inculet, Anna Tomiak, Jawaid Younus, Brian Dingle, Walter Kocha, Mark Vincent

Edward Yu

OBJECTIVE: To assess the impact of extended field irradiation with anastomotic coverage on local recurrence in high risk resected esophageal cancerpatients. METHODS: From 1989-1999, high risk resected esophageal cancer cases receiving post-resection chemoradiation were reviewed. Adjuvant chemotherapy consisted of four cycles of fluorouracil-based regimens. Loco-regional irradiation with or without coverage of anastomotic site had radiation a dose range from 45-60 Gyat 1.8-2.0 Gy/fraction given with initial anterior-posterior/posterior-anterior arrangement with either extended (with anastomotic coverage), or small (without anastomotic coverage) field followed by oblique fields for boost. RESULTS: One hundred eighty-eight charts were reviewed. Seventy-two patients were eligible for post-resection chemoradiation. …


Dosimetric Evaluation Of Helical Tomotherapy Treatment Planning For Non-Small Cell Lung Cancer, Karen Chu, George Rodrigues, Slav Yartsev, A. Rashid Dar, Edward Yu, Robert Ash, Brian Yaremko, Marc Mackenzie, Harvey Quon, Glenn Bauman, Wilson Roa Dec 2007

Dosimetric Evaluation Of Helical Tomotherapy Treatment Planning For Non-Small Cell Lung Cancer, Karen Chu, George Rodrigues, Slav Yartsev, A. Rashid Dar, Edward Yu, Robert Ash, Brian Yaremko, Marc Mackenzie, Harvey Quon, Glenn Bauman, Wilson Roa

Edward Yu

Helical tomotherapy (HT) is a novel technique to deliver intensity modulated radiation therapy guided by 3D megavoltage CT imaging. The purpose of our study is to assess the dosimetric parameters related to HT and 3DCRT in advanced non-small cell lung cancer (NSCLC). Eleven patients from the London Regional Cancer Centre and the Cross Cancer Institute with NSCLC underwent individualized treatment planning on both HT and 3DCRT. Corresponding HT and 3DCRT plans for each patient were analyzed using dose-volume histograms for GTV, PTV (median dose 60Gy/30 fractions), and critical structures (lung V5-30, esophageal V50-60, and spinal cord D1). Observed differences in …


Definitive Radiation Therapy Management For Medically Non-Resectable Clinically Localised Non-Small Cell Lung Cancer: Results & Prognostic Factors, Edward Yu, Patricia Tai, Robert Ash, Michael Lee, Larry Stitt, George Rodrigues, Rashid Dar, Mark Vincent, Richard Inculet, Richard Malthaner Dec 2006

Definitive Radiation Therapy Management For Medically Non-Resectable Clinically Localised Non-Small Cell Lung Cancer: Results & Prognostic Factors, Edward Yu, Patricia Tai, Robert Ash, Michael Lee, Larry Stitt, George Rodrigues, Rashid Dar, Mark Vincent, Richard Inculet, Richard Malthaner

Edward Yu

The aim of this paper is to review the experience of radical radiation therapy and the prognostic factors of patient outcome for clinically localised, medically inoperable non-small cell lung cancer (NSCLC) patients. Clinically staged node-negative NSCLC patients who were not a surgical candidates due to co-morbid diseases but who were eligible for curative treatment, were reviewed in the London Regional Cancer Program (LRCP). This study population was treated between 1st Jan 1985 to 31st Jan 2004. Patients were excluded if they were previously treated with chest radiotherapy. Patients with localised disease, but who refused surgery, were also included in the …