Fig. 1From: Recent epidemiology of patients with gastro-entero-pancreatic neuroendocrine neoplasms (GEP-NEN) in Japan: a population-based studyDistribution of primary sites of NENs and age in Japan. a Pie chart of GEP-NENs. Rectal NENs comprise 53% of GEP-NENs, followed by the pancreas at 20%, then stomach. b Age distributions of GEP-NENs in Japan. The scale is incidence /100,000 per year. c Primary site distribution of GEP-NENs for every age decade. d Diagnostic opportunity for NENsBack to article page