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Open-Access Journal
Editorial
Positron emission tomography as predictor of rectal cancer response during or following neoadjuvant chemoradiation 
Shane Hopkins, Marwan Fakih, Gary Y Yang 
World J Gastrointest Oncol 2(5):213-217. Published online May 15, 2010. doi: 10.4251/wjgo.v2.i5.213
Topic Highlight
Tumor stem cell, or its niche, which plays a primary role in tumorigenesis? 
Jiang Zhu, Jin Ding, Fei Ding 
World J Gastrointest Oncol 2(5):218-221. Published online May 15, 2010. doi: 10.4251/wjgo.v2.i5.218
New progress in CT and MRI examination and diagnosis of small intestinal tumors 
Fei Miao, Ming-Liang Wang, Yong-Hua Tang 
World J Gastrointest Oncol 2(5):222-228. Published online May 15, 2010. doi: 10.4251/wjgo.v2.i5.222
Perspectives on the treatment of colorectal carcinoma 
Ren Zhao, Jing Li 
World J Gastrointest Oncol 2(5):229-234. Published online May 15, 2010. doi: 10.4251/wjgo.v2.i5.229
Review
Peroxisome proliferator activated receptor-γ and the ubiquitin-proteasome system in colorectal cancer 
Ioannis A Voutsadakis 
World J Gastrointest Oncol 2(5):235-241. Published online May 15, 2010. doi: 10.4251/wjgo.v2.i5.235
Case Report
Intermittent gastric outlet obstruction caused by a prolapsing antral gastric polyp 
Mehul Parikh, Brian Kelley, Gabriel Rendon, Bincy Abraham 
World J Gastrointest Oncol 2(5):242-246. Published online May 15, 2010. doi: 10.4251/wjgo.v2.i5.242
Embryonal sarcoma of the liver with chondroid differentiation 
Sawako Kinjo, Shinji Sakurai, Junko Hirato, Yutaka Sunose 
World J Gastrointest Oncol 2(5):247-250. Published online May 15, 2010. doi: 10.4251/wjgo.v2.i5.247