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Open-Access Journal
Markers of bile duct tumors 
Giulia Malaguarnera, Maria Giordano, Isabella Paladina, Alessandra Rando, Mario Uccello, Francesco Basile, Antonio Biondi, Santo Carnazzo, Innocenza Alessandria, Clorinda Mazzarino 
World J Gastrointest Oncol 3(4):49-59. Published online Apr 15, 2011. doi: 10.4251/wjgo.v3.i4.49
Brief Article
Chemotherapy plus percutaneous radiofrequency ablation in patients with inoperable colorectal liver metastases 
Joseph Sgouros, James Cast, Krishna K Garadi, Maria Belechri, David J Breen, John RT Monson, Anthony Maraveyas 
World J Gastrointest Oncol 3(4):60-66. Published online Apr 15, 2011. doi: 10.4251/wjgo.v3.i4.60
Case Report
Primary gastric signet ring cell carcinoma presenting as cardiac tamponade 
Jun-Yan Huang, Hai-Ping Jiang, Dan Chen, Han-Lin Tang 
World J Gastrointest Oncol 3(4):67-70. Published online Apr 15, 2011. doi: 10.4251/wjgo.v3.i4.67