preferred_name: Stage II Duodenal and Ampulla of Vater Neuroendocrine Tumor AJCC v9
preferred_name_lc: stage ii duodenal and ampulla of vater neuroendocrine tumor ajcc v9
label: Stage II Duodenal and Ampulla of Vater Neuroendocrine Tumor AJCC v9
label_lc: stage ii duodenal and ampulla of vater neuroendocrine tumor ajcc v9