Ampullary cancer of intestinal origin and duodenal cancer - A logical clinical and therapeutic subgroup in periampullary cancer

Table 1 Proportion of periampullary cancer subtypes resected in pancreaticoduodenectomy series

Study (Institution, author, yr)	n	Pancreatic cancer	Ampullary cancer	Biliary cancer	Duodenal cancer
Johns Hopkins, United States He et al[14], 2014	2564	66%	16%	12%	6%
Academic Medical Centre, The Netherlands Tol et al[8], 2015	760	46%	30%	20%	4%
Taipei Veterans General Hospital, Taiwan Chen et al[15], 2013	501	34%	50%	10%	5%
Ohio State University, United States Hatzaras et al[24], 2010	346	72%	23%	5%	0
Oslo University Hospital, Norway Pomianowska et al[16], 2013	207	33%	28%	14%	25%
South Australian Pathology Database, Adelaide, Australia Chandrasegaram et al[6], 2015	115	55%	28%	15%	3%
University Medical Center Groningen, The Netherlands Van Roest et al[25], 2008	121	42%	25%	16%	17%
Leeds Teaching Hospitals NHS Trust, United Kingdom Menon et al[76], 2009	83	33%	29%	39%	N/I
Queen Elizabeth Hospital, Birmingham, United Kingdom Jarufe et al[28], 2004	251	53%	35%	12%	N/I
University of California San Diego, United States Katz et al[17], 2004	120	62%	26%	8%	4%

N/I: May not have been included.