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Open-Access Journal
Editorial
Multiple cells of origin in cholangiocarcinoma underlie biological, epidemiological and clinical heterogeneity 
Vincenzo Cardinale, Guido Carpino, Lola Reid, Eugenio Gaudio, Domenico Alvaro 
World J Gastrointest Oncol 4(5):94-102. Published online May 15, 2012. doi: 10.4251/wjgo.v4.i5.94
Brief Article
Relationship between HER-2 overexpression and brain metastasis in esophageal cancer patients 
Taher Abu Hejleh, Barry R DeYoung, Eric Engelman, Jeremy M Deutsch, Bridget Zimmerman, Thorvardur R Halfdanarson, Daniel J Berg, Kalpaj R Parekh, William R Lynch, Mark D Iannettoni, Sudershan Bhatia, Gerald Clamon 
World J Gastrointest Oncol 4(5):103-108. Published online May 15, 2012. doi: 10.4251/wjgo.v4.i5.103
Analysis of liver metastasis after resection for pancreatic ductal adenocarcinoma 
Kwang Yeol Paik, Seong Ho Choi, Jin Seok Heo, Dong Wook Choi 
World J Gastrointest Oncol 4(5):109-114. Published online May 15, 2012. doi: 10.4251/wjgo.v4.i5.109
Case Report
A case of severe acalculous cholecystitis associated with sorafenib treatment for advanced hepatocellular carcinoma 
Yosuke Aihara, Hitoshi Yoshiji, Masaharu Yamazaki, Yasuhide Ikenaka, Ryuichi Noguchi, Chie Morioka, Kosuke Kaji, Haruki Tastumi, Keisuke Nakanishi, Maiko Nakamura, Junichi Yamao, Masahisa Toyohara, Akira Mitoro, Masayoshi Sawai, Motoyuki Yoshida, Masao Fujimoto, Masahito Uemura, Hiroshi Fukui 
World J Gastrointest Oncol 4(5):115-118. Published online May 15, 2012. doi: 10.4251/wjgo.v4.i5.115
Greater omentum gastrointestinal stromal tumor with PDGFRA-mutation and hemoperitoneum 
Yoko Murayama, Masayuki Yamamoto, Ryuichiro Iwasaki, Tamana Miyazaki, Yukiko Saji, Yoshinori Doi, Haruki Fukuda, Seiichi Hirota, Masahiro Hiratsuka 
World J Gastrointest Oncol 4(5):119-124. Published online May 15, 2012. doi: 10.4251/wjgo.v4.i5.119