Recent epidemiology of patients with gastro-entero-pancreatic neuroendocrine neoplasms (GEP-NEN) in Japan: a population-based study

Table 1 Incidence of NEN in Japan in 2016

Primary tumor site	Newly diagnosed number in 2016			Adjusted incidence /100,000 population in 2016
Primary tumor site	Male	Female	All cases	Male	Female	All cases
Pancreas	707	629	1336	0.362	0.335	0.697
Esophagus	200	62	262	0.074	0.025	0.098
Stomach	775	267	1042	0.309	0.120	0.482
Duodenum	264	178	442	0.112	0.083	0.195
Jejunum/Ileum	65	32	97	0.031	0.016	0.046
Appendix	55	50	105	0.039	0.035	0.074
Colon	157	121	278	0.069	0.050	0.118
Rectum	1911	1262	3173	1.099	0.723	1.822
GI-NEN	3427	1972	5399	1.733	1.051	2.835
All cases	4134	2601	6735	2.094	1.385	3.532

Incidence was age-adjusted annual incidence per 100,000 to the standard population in Japan

ISSN: 1471-2407