Key Words. Gastric cancer • Surgery • Lymphadenectomy • Outcomes • Review

relationships relevant to the content of this article. The content of this article has been reviewed by independent peer reviewers to ensure that it is balanced, objective, and free from commercial bias. LEARNING OBJECTIVES After completing this course, the reader will be able to: 1. Calculate the lymph node drainage patterns of gastric adenocarcinoma based on the location of the tumor. 2. Differentiate and explain the extent of lymphadenectomies performed in different countries. 3. Analyze the risks and benefits of performing more extensive lymphadenectomies for gastric adenocarcinoma. This article is available for continuing medical education credit at CME.TheOncologist.com.CME The extent of lymphadenectomy that should be performed for gastric adenocarcinoma has been a topic of persistent debate. In countries such as Japan and Korea, where the incidence of gastric adenocarcinoma is high, more exten-sive (e.g., D2) lymphadenectomies are routinely per