preferred_name: Stage IV Duodenal and Ampulla of Vater Neuroendocrine Tumor AJCC v9
preferred_name_lc: stage iv duodenal and ampulla of vater neuroendocrine tumor ajcc v9
label: Stage IV Duodenum and Ampulla of Vater Neuroendocrine Tumor AJCC v9
label_lc: stage iv duodenum and ampulla of vater neuroendocrine tumor ajcc v9