preferred_name: Ampulla of Vater Neuroendocrine Tumor by AJCC v9 Stage
preferred_name_lc: ampulla of vater neuroendocrine tumor by ajcc v9 stage
label: Ampulla of Vater Neuroendocrine Tumor by AJCC v9 Stage
label_lc: ampulla of vater neuroendocrine tumor by ajcc v9 stage