Abbreviations: CT = computed tomography, GEP-NET = gastroenteropancreatic neuroendocrine tumor, LAM = lymphangiomyomatosis, MR = magnetic resonance, NET = neuroendocrine tumor, PRMC = primary retroperitoneal mucinous cystadenocarcinoma, SSA = somatstatin analogue, SSTR2 = somatostatin receptor 2. This evidence concerns the gene SSTR2 and mucinous cystadenocarcinoma.