In 2016, the World Journal of Gastrointestinal Oncology (WJGO) has published the 9^th issue which containing 8 articles contributed by scientists worldwide. Among these comprehensive articles are (1) “Role of targeted therapy in metastatic colorectal cancer”, a Review by Yoshihito Ohhara, MD, et al from the Department of Medical Oncology, Hokkaido University Graduate School of Medicine, Japan; (2) “Association between serum vitamin D levels and gastric cancer: A retrospective chart analysis”, an Original Article by Neil Vyas, MD, et al from Department of Internal Medicine, Elmhurst Hospital Center, United States; and (3) “Delaying surgery after neoadjuvant chemoradiotherapy improves prognosis of rectal cancer”, an Original Article by Esin Kabul Gürbulak, MD, et al from Department of General Surgery, Şişli Etfal Training and Research Hospital, Turkey, etc. We invite you to peruse all 8 articles in this issue, as they present the latest research progress/findings and provide insightful comments in gastrointestinal oncology that will guide basic research and clinical practice in these fields.

This journal is an open-access journal which allows free immediate access to all full-text articles. For details, please visit: Volume 8, Issue 9, September 15, 2016.

Figure 1 The cover of the issue.Editorial Board Member of World Journal of Gastrointestinal Oncology, Deliang Cao, MD, PhD, Associate Professor, Department of Medical Microbiology, Immunology and Cell Biology, Simmons Cooper Cancer Institute, Springfield, IL 62794, United States

The WJGO is a leading academic journal devoted to reporting the latest, cutting-edge research progress and findings of basic research and clinical practice in the field of gastrointestinal oncology. It was launched on October 15, 2009 and is published monthly (12 issues annually) by BPG, the world's leading professional clinical medical journal publishing company.

We encourage gastrointestinal oncologists worldwide to submit manuscripts to the WJGO describing their original basic or clinical research findings that are of high academic value and which report new diagnostic techniques or summarize their treatment experiences.

We invited the readers to download and read the E-Journal of this issue, at:http://www.wjgnet.com/1948-5204/e-journal.htm.