NE Oncology Issue – June 2007

The updated results of the phase III trials comparing XELOX with FOLFOX-4 and FOLFOX-6 are very exciting. I use XELOX in my clinical practice and it is reassuring to see data that clearly demonstrate the equivalence of XELOX to FOLFOX-4 and FOLFOX-6 in both first-line and second-line chemotherapy. Infusional lines are not needed with XELOX, and clinically this is especially relevant since there are pockets in Ontario and other parts of Canada where infusional pumps are not available. There are changing toxicities with XELOX versus FOLFOX, but the toxicities are such that they can be managed easily. It will be interesting to see how XELOX will be used in the adjuvant setting. We have recently completed a phase I study of capecitabine (X), irinotecan (I) and oxaliplatin (O) as first-line therapy in patients with metastatic colorectal cancer.1 We found response rates with XIO therapy to be very high. The overall survival in this study was 79% and the disease control rate was 92%. We now have five patients that have gone in for surgical resection. Our results indicate that XIO is well tolerated and highly effective as a first-line treatment for metastatic colorectal cancer. Targeted therapies are here to stay. There is level 1 evidence to suggest that a targeted therapy such as bevacizumab can add 4.4 months to progression-free survival. Our plan now is to confirm the efficacy and safety of XIO with and without bevacizumab in a phase II trial.

Reference: 1. Maroun J, Jonker D, Cripps C, et al. Encouraging results from a phase I study of capecitabine (X), irinotecan (I) and oxaliplatin (O) as first-line therapy in patients (pts) with metastatic colorectal cancer (MCRC). Program and abstracts of the 43rd American Society of Clinical Oncology Annual Meeting; June 1–5, 2007; Chicago, Illinois; Abstract 4086

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Contributors

dr-hirsh
Vera Hirsh, MD, FRCPC
Chief of the Hematology-Oncology Service, Santa Cabrini Hospital
Associate Professor, Medicine and Oncology, McGill University
Associate Physician, Oncology Service, at the Royal Victoria, Montreal General, and Montreal Chest Hospitals
With a current practice in both hematology and oncology, Dr. Vera Hirsh is an associate professor of medicine and oncology at McGill University. Her research at the Quebec Pulmonary Unit focuses on the treatment of lung cancer, and she continues to chair ongoing international chemotherapy trials. Dr. Hirsh chaired the Quebec Lung Cancer Committee to establish guidelines for the treatment of lung cancer. In addition, she has published abstracts, articles, and book chapters. Dr. Hirsh is a member of advisory boards for many pharmaceutical companies and the Medical Oncology Standing Committee of RTOG.

dr-cripps
Christine Cripps, MD, FRCPC
Medical Oncologist, Director,
Continuing Medical Education,
Ottawa Hospital Regional Cancer Centre
Dr. Christine Cripps is a medical oncologist and director of the Continuing Medical Education Department at the Ottawa Hospital Regional Cancer Centre. She also holds a position of Associate Professor, Medicine at the University of Ottawa. A keen teacher, Dr. Cripps’ main areas of interest include gastrointestinal cancer and head and neck cancer. She also enjoys cycling, skiing, and sailing when time permits.

dr-chia
Stephen K. L. Chia, MD, FRCPC
Assistant Professor of Medicine Department of Medicine
University of British Columbia
British Columbia Cancer Agency
Dr. Chia is a staff oncologist with the British Columbia Cancer Agency (BCCA), Vancouver, Canada. He also serves as physician coordinator for both the breast cancer and head and neck cancer clinical trials at the BCCA – Vancouver Cancer Centre. He is an active researcher in phase I-III trials in breast cancer, head and neck cancer and investigational new drugs. He is currently carrying out studies in breast cancer with grant funded research from the National Cancer Institute of Canada, Canadian Breast Cancer Alliance and Canadian Breast Cancer Foundation – British Columbia/Yukon Chapter. Dr. Chia is an active member of the British Columbia Breast Tumor Group, Breast Cancer Systemic Policy Group and Head and Neck Tumor Group.

dr-chang
José Chang, MD, FRCPC
Head of Medical Oncology, RS
McLaughlin Durham Regional Cancer Centre, Oshawa
Dr. José Chang is the principal investigator and site representative for the National Cancer Institute of Canada Clinical Trials Group, and is an examiner for the Medical Council of Canada. His research interests lie in the areas of breast cancer, melanoma, lymphoma, and quality of life during chemotherapy. Dr Chang has presented at major oncology meetings of the American Society of Clinical Oncology, San Antonio Breast Cancer Symposia, and European Breast Cancer Conference. A member of the editorial board of the journal Current Oncology, Dr. Chang has published in journals such as the Journal of Clinical Oncology, European Journal of Cancer, and Canadian Medical Association Journal.