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Latest Article

Oropharyngeal Mucositis in Cancer Therapy

Oropharyngeal mucositis is a common and treatment-limiting sideeffect of cancer therapy. Severe oral mucositis can lead to the need tointerrupt or discontinue cancer therapy and thus may have an impacton cure of the primary disease. Mucositis may also increase the risk oflocal and systemic infection and significantly affects quality of life andcost of care. Current care of patients with mucositis is essentially palliativeand includes appropriate oral hygiene, nonirritating diet andoral care products, topical palliative mouth rinses, topical anesthetics,and opioid analgesics. Systemic analgesics are the mainstay of painmanagement. Topical approaches to pain management are under investigation.The literature supports use of benzydamine for prophylaxisof mucositis caused by conventional fractionationated head andneck radiotherapy, and cryotherapy for short–half-life stomatoxic chemotherapy,such as bolus fluorouracil. Continuing studies are investigatingthe potential use of biologic response modifiers and growth factors,including topical and systemic delivery of epithelial growth factorsand agents. Progress in the prevention and management of mucositiswill improve quality of life, reduce cost of care, and facilitate completionof more intensive cancer chemotherapy and radiotherapy protocols. Inaddition, improved management of mucositis may allow implementationof cancer treatment protocols that are currently excessively mucotoxicbut may produce higher cure rates. Continuing research related to thepathogenesis and management of mucositis will undoubtedly lead to thedevelopment of potential interventions and improved patient care.

Latest Article

Targeted Therapy in Rectal Cancer

Epidermal growth factor receptor (EGFR) and vascular endothelial growth factor (VEGF) are often overexpressed in colorectal cancer and are associated with inferior outcomes. Based on successful randomized phase III trials, anti-EGFR and anti-VEGF therapeutics have entered clinical practice. Cetuximab (Erbitux), an EGFR-specific antibody, is currently approved in the United States in combination with irinotecan (Camptosar) for patients with metastatic colorectal cancer refractory to irinotecan or as a single agent for patients unable to tolerate irinotecan-based therapy. In retrospective analyses, patients with EGFR-expressing rectal cancer undergoing neoadjuvant radiation therapy had a significantly inferior disease-free survival and lower rates of achieving pathologic complete response. Based on the positive data in metastatic colorectal cancer and synergy with radiation therapy seen in preclinical models, there is a strong rationale to combine cetuximab with neoadjuvant radiation therapy and chemotherapy in rectal cancer. Bevacizumab (Avastin), a VEGF-specific antibody, was the first antiangiogenic agent to be approved in the United States for use in combination with standard chemotherapy in the first- and second-line of treatment in metastatic colorectal cancer. VEGF-targeted therapy may lead to indirect killing of cancer cells by damaging tumor blood vessels, and may increase the radiosensitivity of tumor-associated endothelial cells. VEGF blockade can also "normalize" tumor vasculature, thereby leading to greater tumor oxygenation and drug penetration. This review will address completed and ongoing trials that have established and continue to clarify the effects of these agents in rectal cancer.