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George D. Demetri, Margaret von Mehren, Cristina R. Antonescu, Ronald P. DeMatteo, Kristen N. Ganjoo, Robert G. Maki, Peter W.T. Pisters, Chandrajit P. Raut, Richard F. Riedel, Scott Schuetze, Hema M. Sundar, Jonathan C. Trent and Jeffrey D. Wayne

The standard of care for managing patients with gastrointestinal stromal tumors (GISTs) rapidly changed after the introduction of effective molecularly targeted therapies involving tyrosine kinase inhibitors (TKIs), such as imatinib mesylate and sunitinib malate. A better understanding of the molecular characteristics of GISTs have improved the diagnostic accuracy and led to the discovery of novel immunomarkers and new mechanisms of resistance to TKI therapy, which in turn have resulted in the development of novel treatment strategies. To address these issues, the NCCN organized a task force consisting of a multidisciplinary panel of experts in the fields of medical oncology, surgical oncology, molecular diagnostics, and pathology to discuss the recent advances, identify areas of future research, and recommend an optimal approach to care for patients with GIST at all stages of disease. The task force met for the first time in October 2003 and again in December 2006 and October 2009. This supplement describes the recent developments in the field of GIST as discussed at the October 2009 meeting.

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George D. Demetri, Scott Antonia, Robert S. Benjamin, Marilyn M. Bui, Ephraim S. Casper, Ernest U. Conrad III, Thomas F. DeLaney, Kristen N. Ganjoo, Martin J. Heslin, Raymond J. Hutchinson, John M. Kane III, G. Douglas Letson, Sean V. McGarry, Richard J. O'Donnell, I. Benjamin Paz, John D. Pfeifer, Raphael E. Pollock, R. Lor Randall, Richard F. Riedel, Karen D. Schupak, Herbert S. Schwartz, Katherine Thornton, Margaret von Mehren and Jeffrey Wayne

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Jeffrey Crawford, James Armitage, Lodovico Balducci, Charles Bennett, Douglas W. Blayney, Spero R. Cataland, David C. Dale, George D. Demetri, Harry P. Erba, James Foran, Alison G. Freifeld, Marti Goemann, Mark L. Heaney, Sally Htoy, Susan Hudock, Dwight D. Kloth, David J. Kuter, Gary H. Lyman, Laura Boehnke Michaud, Sarah C. Miyata, Martin S. Tallman, Saroj Vadhan-Raj, Peter Westervelt and Michael K. Wong

Myeloid Growth Factors Clinical Practice Guidelines in Oncology NCCN Categories of Evidence and Consensus Category 1: The recommendation is based on high-level evidence (e.g., randomized controlled trials) and there is uniform NCCN consensus. Category 2A: The recommendation is based on lower-level evidence and there is uniform NCCN consensus. Category 2B: The recommendation is based on lower-level evidence and there is nonuniform NCCN consensus (but no major disagreement). Category 3: The recommendation is based on any level of evidence but reflects major disagreement. All recommendations are category 2A unless otherwise noted. Clinical trials: The NCCN believes that the best management for any cancer patient is in a clinical trial. Participation in clinical trials is especially encouraged. Overview Neutropenia (< 500 neutrophils/mcL or < 1000 neutrophils/mcL and a predicted decline to ≤ 500/mcL over the next 48 hours) and resulting febrile neutropenia (FN; ≥ 38.3°C orally or ≥ 38.0°C over 1 hour) can be induced by myelosuppressive chemotherapy. FN is a major dose-limiting toxicity of chemotherapy, often necessitating hospitalization for evaluation and empiric broad-spectrum antibiotics. These complications often result in dose reductions or treatment delays, which may compromise clinical outcomes. The prophylactic use of colony-stimulating factors (CSFs) can reduce the risk, severity, and duration of FN. Despite these benefits, CSFs are not administered to all patients under going myelosuppressive chemotherapy because of the costs associated with routine use. Selective use of CSFs in patients at increased risk for neutropenic complications may, however, enhance cost-effectiveness by directing treatment toward patients most likely to...