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Yixing Jiang, Heath Mackley, Hua Cheng, and Jaffer A. Ajani

Use of definitive chemoradiation as primary therapy for locoregional squamous cell carcinoma of the anal canal has been the standard approach in the United States since the 1980s. Over the past several years, phase III studies have shown that combination mitomycin C (MMC) and 5-fluorouracil (5-FU) concurrent with radiotherapy had better outcomes than radiotherapy alone or 5-FU with radiotherapy. Two recent phase III studies using diverse treatment strategies showed that cisplatin and 5-FU were not superior to 5-FU and MMC; in one of the trials, use of cisplatin-based chemoradiation resulted in a higher rate of colostomy compared with mitomycin-based chemoradiation. MMC and 5-FU concurrent with radiotherapy remains standard care. Further improvement is likely depending on an increased understanding of the molecular biology of anal carcinoma and the addition of relevant biologic agents to chemoradiation to overcome chemoradiation resistance.

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Prajnan Das, Yixing Jiang, Jeffrey H. Lee, Manoop S. Bhutani, William A. Ross, Paul F. Mansfield, and Jaffer A. Ajani

Most patients with localized gastric cancer require multimodality therapy. Surgery is the primary treatment for localized gastric cancer, although controversy exists about the optimal extent of lymphadenectomy in these patients. Recent studies have evaluated the role of laparoscopic surgery and endoscopic mucosal resection in selected patients. Multimodality treatment options for these patients include post-operative chemoradiation and perioperative chemotherapy. The Intergroup 0116 trial demonstrated that patients treated with surgery and post-operative chemoradiation had significantly higher overall survival compared to patients treated with surgery alone. The MAGIC trial showed that patients treated with perioperative epirubicin, cisplatin, and 5-fluorouracil had significantly higher overall survival compared to patients treated with surgery alone. Other recent trials have evaluated the roles of preoperative chemoradiation and adjuvant chemotherapy. Multidisciplinary evaluation plays a crucial role in the management of these patients.