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Open-Access Journal
Frontier
Review
Andre Bratanic, Dorotea Bozic, Antonio Mestrovic, Dinko Martinovic, Marko Kumric, Tina Ticinovic Kurir, Josko Bozic 
World J Gastrointest Oncol 13(12):1863-1879. Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.1863
Zeno Sparchez, Pompilia Radu, Adrian Bartos, Iuliana Nenu, Rares Craciun, Tudor Mocan, Adelina Horhat, Mihaela Spârchez, Jean-François Dufour 
World J Gastrointest Oncol 13(12):1896-1918. Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.1896
Tommaso M Manzia, Alessandro Parente, Ilaria Lenci, Bruno Sensi, Martina Milana, Carlo Gazia, Alessandro Signorello, Roberta Angelico, Giuseppe Grassi, Giuseppe Tisone, Leonardo Baiocchi 
World J Gastrointest Oncol 13(12):1939-1955. Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.1939
Anastasia Mala, Kalliopi Foteinogiannopoulou, Ioannis E Koutroubakis 
World J Gastrointest Oncol 13(12):1956-1980. Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.1956
Armando Rojas, Cristian Lindner, Iván Schneider, Ileana Gonzàlez, Hernan Araya, Erik Morales, Milibeth Gómez, Nelson Urdaneta, Paulina Araya, Miguel Angel Morales 
World J Gastrointest Oncol 13(12):1997-2012. Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.1997
Minireviews
Tudor Mocan, Adelina Horhat, Emil Mois, Florin Graur, Cristian Tefas, Rares Craciun, Iuliana Nenu, Mihaela Spârchez, Zeno Sparchez 
World J Gastrointest Oncol 13(12):2050-2063. Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.2050
Stavros Spiliopoulos, Maria Teresa Zurlo, Annachiara Casella, Letizia Laera, Giammarco Surico, Alessia Surgo, Alba Fiorentino, Nicola de'Angelis, Roberto Calbi, Riccardo Memeo, Riccardo Inchingolo 
World J Gastrointest Oncol 13(12):2064-2075. Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.2064
Takuya Sho, Kenichi Morikawa, Akinori Kubo, Yoshimasa Tokuchi, Takashi Kitagataya, Ren Yamada, Taku Shigesawa, Mugumi Kimura, Masato Nakai, Goki Suda, Mitsuteru Natsuizaka, Koji Ogawa, Naoya Sakamoto 
World J Gastrointest Oncol 13(12):2076-2087. Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.2076
Basic Study
Mitsuru Sugimoto, Kazumichi Abe, Tadayuki Takagi, Rei Suzuki, Naoki Konno, Hiroyuki Asama, Yuki Sato, Hiroki Irie, Ko Watanabe, Jun Nakamura, Hitomi Kikuchi, Mika Takasumi, Minami Hashimoto, Tsunetaka Kato, Ryoichiro Kobashi, Takuto Hikichi, Hiromasa Ohira 
World J Gastrointest Oncol 13(12):2088-2100. Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.2088
Loraine Kay D Cabral, Cynthia A Mapua, Filipinas F Natividad, Caecilia H C Sukowati, Edgardo R Cortez, Ma Luisa D Enriquez 
World J Gastrointest Oncol 13(12):2101-2113. Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.2101
Retrospective Cohort Study
Elizabeth SL Low, Ross Apostolov, Darren Wong, Sandra Lin, Numan Kutaiba, Josephine A Grace, Marie Sinclair 
World J Gastrointest Oncol 13(12):2149-2160. Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.2149
Retrospective Study
Prospective Study
Systematic Reviews
Renato Patrone, Francesco Izzo, Raffaele Palaia, Vincenza Granata, Guglielmo Nasti, Alessandro Ottaiano, Gilda Pasta, Andrea Belli 
World J Gastrointest Oncol 13(12):2203-2215. Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.2203
Letter to the Editor