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Stage III Lung Cancer: Two or Three Modalities? Review 1

Lung cancer is the leading cause of cancer mortality in the United States. A significant number of patients present with disease involving mediastinal lymph nodes. As survival after surgery alone for stage III disease is poor, radiation therapy and chemotherapy have been evaluated in the neoadjuvant and adjuvant settings to improve outcomes. The benefit of adjuvant chemotherapy in the subgroup of patients with N2 disease is uncertain. Small randomized trials enrolling patients with stage III disease have shown a benefit of neoadjuvant chemotherapy over surgery alone. Whether neoadjuvant chemotherapy is superior to adjuvant chemotherapy is under investigation. Furthermore, whether neoadjuvant chemoradiotherapy is superior to neoadjuvant chemotherapy is controversial, and few randomized studies comparing these approaches have been reported. Nevertheless, neoadjuvant chemoradiotherapy appears to be associated with higher rates of resection, higher rates of clearance of mediastinal nodal disease, and better local/regional control. The use of postoperative radiation therapy (PORT) has declined since the publication of the 1998 meta-analysis suggested a detriment in survival with this strategy. However, radiation techniques are improving and emerging data support the use of carefully delivered PORT. Finally, it remains unclear whether surgical resection offers an advantage over definitive chemoradiotherapy alone for stage III disease. In summary, locally advanced NSCLC remains a formidable challenge with few cures, and optimal treatment requires the careful use of surgery, chemotherapy, and radiation therapy.

Latest Article

Current Therapies for Advanced Colorectal Cancer

Significant advances have been made in the treatment of advancedcolorectal cancer over the past 5 years, namely due to the introductionof three novel cytotoxic agents-capecitabine (Xeloda), irinotecan(Camptosar), and oxaliplatin (Eloxatin)-and the recent approval oftwo biologic agents-bevacizumab (Avastin) and cetuximab (Erbitux).During this time period, the median survival of patients with advanced,metastatic disease has gone from 10 to 12 months to nearly 24 months.Intense efforts have focused on identifying novel targeted therapies thattarget specific growth factor receptors, critical signal transduction pathways,and/or key pathways that mediate the process of angiogenesis.Recent clinical trial results suggest that the anti-VEGF antibodybevacizumab can be safely and effectively used in combination witheach of the active anticancer agents used in colorectal cancer. Despitethe development of active combination regimens, significant improvementsin the actual cure rate have not yet been achieved. Combinationregimens with activity in advanced disease are being evaluated in theadjuvant and neoadjuvant settings. The goal is to integrate these targetedstrategies into standard chemotherapy regimens so as to advancethe therapeutic options for the treatment of advanced colorectal cancer.Finally, intense efforts are attempting to identify the critical molecularbiomarkers that can be used to predict for either clinicalresponse to chemotherapy and/or targeted therapies and/or the drugspecificside effects. The goal of such studies is to facilitate the evolutionof empiric chemotherapy to individually tailored treatments forpatients with colorectal cancer.